---
title: "Crunch Labs Build Box — £100K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/toys-games/crunch-labs-build-box"
last_updated: "2026-07-31T12:24:30.561Z"
locale: en
meta:
description: "Niche score 46/100 · £100K/yr market · 280K searches/yr · £19.11 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · £100K/yr market · 280K searches/yr · £19.11 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Crunch Labs Build Box — £100K/yr Amazon UK Niche (2026) - Flapen"
---
# **crunch labs build box**
**Skip it**
Soft demand (-19.3% this quarter) — this niche doesn't clear our bar today.
Market size 25Growth 15Conversion 23Competition 41Returns 91Price range 75Avg price 85Brand share 42Review moat 71Quality gap 72
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****£19.11**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£6.76–£39.78**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****667.26**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****80%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****61%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****£100K**
£100K/yr · 280K searches
**Conversion**
**Bad****1.9%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-19.3%**
90-day search growth — must beat 0% to launch
**Signals**[** Out of Stock**](https://flapen.com/research/niches?market=uk&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United Kingdom niche tracking, crunch labs build box is a £100K/yr Amazon United Kingdom market (280K searches/yr). The top 5 brands hold 80% of demand. Verdict: Skip it — 46/100.
Data updated Jul 30, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **crunch labs build box market data**
- **Units sold / yr**
- **3K–3K**
- avg 100–250/product
- **Revenue / yr**
- **£48K–£57K**
- units × avg price
- **Conversion rate**
- **1.9%**
- **Avg BSR**
- **#230**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **95%**
- **Out of stock**
- **11.1%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**13 **▲rising
**Sellers**
**35**
**Top-5 brand share**
**80%**
Top 20: 100%
**Top-5 click share**
**61%**
Top 20: 100%
**Open market**
**14%**
- ADUSRIZ39% - CRUNCH LABS19% - Lypsochaat8% - SCIENCE DIARY7% - CONSTRUCT & CREATE7% - OMWay6% - Open — no brand owns it (7 brands, 14%)
## **Demand**
Weekly Amazon search volume, last 34 weeks — -19.3% search growth over the last 90 days.
25K15KSpike '26Dec '25Jan '26Feb '26Mar '26Apr '26May '26Jul '26
[**Open Trend **](https://flapen.com/research/uk/toys-games/crunch-labs-build-box/trend)
## **Top crunch labs build box search terms**
- **crunch labs build box**162K/yr-29.9%0.6% conv. - **crunch labs**48K/yr+13.1%0.9% conv. - **crunch labs build box by mark rober**16K/yr-22.2%0.4% conv. - **crunchlabs**11K/yr+32.1%0.8% conv. - **mark rober crunch labs**9K/yr-14.3%0.7% conv. - **crunchlabs build box**10K/yr-44.9%0.9% conv. - **kiwico**7K/yr+14.9%0.4% conv. - **kiwico kits**6K/yr+21.2%0.4% conv. - **crunch lab**7K/yr-18.8%1.4% conv. - **crunch labs uk**4K/yr-63.0%0.6% conv. [**All search terms **](https://flapen.com/research/uk/toys-games/crunch-labs-build-box/search-terms)
## **Top crunch labs build box products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%£10K20%£20K30%£30K40%£40K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 19 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**STEM Toys Age 8+ Wooden Engineering Science Experiments kit(6 Pack Set)**ADUSRIZ**£18.42**4.5★459 rev](https://www.amazon.co.uk/dp/B0D99KPV1P) [2**CrunchLabs by Mark Rober Experience Mind Blowing Fun with Turbo Trick Planes FOLD LAUNCH FLY & Create the Ultimate Paper Airplane Engineered to Deliver Huge Blow-your-mind aha Moments**CRUNCH LABS**£12.70**4.0★2 rev](https://www.amazon.co.uk/dp/B0G3Y2FSKT) [3**STEM Toys Age 8+ Wooden Engineering Science Experiments kit(6 Pack Set)**ADUSRIZ**£18.78**4.2★189 rev](https://www.amazon.co.uk/dp/B0F7QDRL6B) [4**6 in 1 STEM Kits for Kids 6-8 8-12 Electronic STEM Science Robot Kit Engineering Building Activities Kit Educational Learning Toys for Kids Boys Girls 8-12 Birthday Gift**Lypsochaat**£18.64**4.0★240 rev](https://www.amazon.co.uk/dp/B0CSSJ4965) [5**SCIENCE DIARY STEM Toys for Kids - Robot Building Kit Engineering Experiments Crafts Set with Motor and Tools Learning Toys Activities for Researching Christmas Birthday Gifts for Boys and Girls**SCIENCE DIARY**£18.46**4.6★172 rev](https://www.amazon.co.uk/dp/B0FGX8J73Y)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**CrunchLabs by Mark Rober Experience Mind Blowing Fun with Turbo Trick Planes FOLD LAUNCH FLY & Create the Ultimate Paper Airplane Engineered to Deliver Huge Blow-your-mind aha Moments**CRUNCH LABS**£12.70**2 rev1mo ago](https://www.amazon.co.uk/dp/B0G3Y2FSKT) [**CrunchLabs The Crunchinator by Mark Rober Crunch Smoosh Squeeze & Pop Objects Harness the Awesome Kid Power And Experience Mind Blowing Crushing Satisfaction! What Will You Crunch?**CRUNCH LABS**£29.09**1 rev1mo ago](https://www.amazon.co.uk/dp/B0G3Y3RNZQ) [**CrunchLabs by Mark Rober Slime Prank Lab Build a Snot Pump & Create the Perfect Prank Slime Every Time! Engineered to Deliver Huge Blow-your-mind aha Moments Where Brainpower Meets Adrenaline!**CRUNCH LABS**£18.27**0 rev1mo ago](https://www.amazon.co.uk/dp/B0G3Y1B65D) [**SCIENCE DIARY STEM Toys for Kids - Robot Building Kit Engineering Experiments Crafts Set with Motor and Tools Learning Toys Activities for Researching Christmas Birthday Gifts for Boys and Girls**SCIENCE DIARY**£18.46**172 rev10mo ago](https://www.amazon.co.uk/dp/B0FGX8J73Y) [**SharkBebe BoysTshirt Steves Lava Chicken Boys Cartoon T-Shirt Summer 100% Cotton Short Sleeve Top Tee for Kids Ages 4-13 (UK Age 9 Years 10 Years Regular Navy)**SharkBebe**£11.04**22 rev1y ago](https://www.amazon.co.uk/dp/B0FFGV57MT)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**CrunchLabs The Crunchinator by Mark Rober Crunch Smoosh Squeeze & Pop Objects Harness the Awesome Kid Power And Experience Mind Blowing Crushing Satisfaction! What Will You Crunch?**CRUNCH LABS**£29.09**5.0★**▲ 500%**](https://www.amazon.co.uk/dp/B0G3Y3RNZQ) [**CrunchLabs by Mark Rober Experience Mind Blowing Fun with Turbo Trick Planes FOLD LAUNCH FLY & Create the Ultimate Paper Airplane Engineered to Deliver Huge Blow-your-mind aha Moments**CRUNCH LABS**£12.70**4.0★**▲ 498%**](https://www.amazon.co.uk/dp/B0G3Y2FSKT) [**CrunchLabs by Mark Rober Slime Prank Lab Build a Snot Pump & Create the Perfect Prank Slime Every Time! Engineered to Deliver Huge Blow-your-mind aha Moments Where Brainpower Meets Adrenaline!**CRUNCH LABS**£18.27**0.0★**▲ 494%**](https://www.amazon.co.uk/dp/B0G3Y1B65D) [**WEAR IF U DARE Mens Boxers Shorts (5 Pack) Multipacked Underwear Gift Set | Comfortable Stretch Cotton Mens Trunks Colourful Underpants Briefs Teal**WEAR IF U DARE**£12.46**4.4★**▲ 489%**](https://www.amazon.co.uk/dp/B07MF3PVZ3) [**SharkBebe BoysTshirt Steves Lava Chicken Boys Cartoon T-Shirt Summer 100% Cotton Short Sleeve Top Tee for Kids Ages 4-13 (UK Age 9 Years 10 Years Regular Navy)**SharkBebe**£11.04**4.3★**▲ 485%**](https://www.amazon.co.uk/dp/B0FFGV57MT)
**~~View all trending →~~**
## **What buyers say about crunch labs build box**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Fun/Entertainment Experience**20%
*“Engaging toy”*
**Gifting Purpose**19%
*“A nice gift”*
**Quality-Overall**10%
*“Kit itself looked ok”*
**Value For Money**7%
*“Well worth the money”*
**Educational-Overall**7%
*“Fun educational gift”*
**Instructions/User Manual/Troubleshooting**6%
*“The instructions were clear”*
**Assembly/Installation**5%
*“Not too challenging to put together”*
**Design-Overall**5%
*“thoroughly enjoyed building it”*
**Creativity**3%
*“I bought this for a gift for my sons best friend and he absolutely loves it,so creative and great gift”*
**Developmental Needs**2%
*“Brilliant for kids”*
### **What buyers complain about **
**Instructions/User Manual/Troubleshooting**14%
*“The instructions arent great and myself and my son are very capable so its not on us”*
**Quality-Overall**14%
*“rubbish quality”*
**Functionality-Overall**10%
*“didnt work as intended”*
**Size-Overall**8%
*“Very small parts”*
**Durability**7%
*“Broke”*
**Assembly/Installation**5%
*“Packets of cheap Chinese plastic with no instructions on how to assemble”*
**Wheel Quality**4%
*“unfortunately one of the wheels is faulty”*
**Value For Money**3%
*“Not worth the effort. or cost”*
**Connectivity-Overall**3%
*“some of the electrical connections were not made well”*
**Material Quality**3%
*“A bit cheap in its materials and qualtiy”*
### **Top return reasons **
**Defective Material/Parts**27%
**Instructions/User Manual/Troubleshooting**15%
**Functionality-Overall**13%
**Gifting Purpose**11%
**Quality-Overall**9%
**Size-Overall**6%
**Assembly/Installation**4%
**Durability**2%
**Mechanism Issues**2%
**Advertised Vs Actual Product**1%
## **Common questions**
- **Is crunch labs build box profitable to sell on Amazon United Kingdom?**
- The niche generates £100K/yr across 19 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is -19.3%. Flapen's verdict: Skip it (46/100).
- **How competitive is the crunch labs build box niche?**
- 13 brands and 35 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 80% of demand.
- **What do buyers complain about in crunch labs build box?**
- Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Quality-Overall, Functionality-Overall. The return rate is 1.2%.
- **What does it cost to enter the crunch labs build box niche?**
- Listings span £6.76–£39.78; the average listing price is £19.11 (sweet spot $15–$100). The average incumbent carries 667 reviews — the moat a new listing must climb.
## **Related niches in Toys & Games**
- 69 [**bug hunting kits for children**](https://flapen.com/research/uk/toys-games/bug-hunting-kits-for-children)£112K/yr+112.3%**Worth a look**- 69 [**lilo**](https://flapen.com/research/uk/toys-games/lilo)£392K/yr+604.6%**Worth a look**- 69 [**toys for 1 year old boys**](https://flapen.com/research/uk/toys-games/toys-for-1-year-old-boys)£1.9M/yr+8.5%**Launch it**- 70 [**remote control boat**](https://flapen.com/research/uk/toys-games/remote-control-boat)£245K/yr+82.2%**Worth a look**- 70 [**sand pit**](https://flapen.com/research/uk/toys-games/sand-pit)£246K/yr+75.0%**Worth a look**- 71 [**tanning pool**](https://flapen.com/research/uk/toys-games/tanning-pool)£291K/yr>1,000%**Worth a look**[**All Toys & Games niches **](https://flapen.com/research/uk/toys-games)