Is stem toys profitable to sell on Amazon United Kingdom?

The niche generates £149K/yr across 46 tracked products. 4 of 7 products launched in the last 360 days are still selling. 90-day search growth is -7.7%. Flapen's verdict: Worth a look (55/100).

How competitive is the stem toys niche?

30 brands and 110 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 52% of demand.

What do buyers complain about in stem toys?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Instructions/User Manual/Troubleshooting. The return rate is 1.0%.

When does demand for stem toys peak?

Demand peaks in Nov–Dec; the busiest month runs 7.3× the quietest.

What does it cost to enter the stem toys niche?

Listings span £7.09–£41.87; the average listing price is £19.72 (sweet spot $15–$100). The average incumbent carries 3,523 reviews — the moat a new listing must climb.

stem toys

Worth a look

Shows low returns (1.0%), but soft demand (-7.7% this quarter) keeps it on the watch list.

Returns

Incredible1.0%

return rate — above 5% kills the launch gate

Avg price

Great£19.72

avg listing price — sweet spot $15–$100

Brand share

Great52%

top-5 brand share — no brand owns this niche

Price range

Great£7.09–£41.87

cheapest to priciest tracked listing — scored on the share inside $15–$100

Competition

Good42%

top-5 click share — leaders hold, buyers still browse

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Okay£149K

£149K/yr · 359K searches

Review moat

Okay3,522.52

avg incumbent reviews — the moat a new listing must climb

Conversion

Okay2.1%

search→purchase rate — share of searches ending in a sale

Growth

Bad-7.7%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United Kingdom niche tracking, stem toys is a £149K/yr Amazon United Kingdom market (359K searches/yr). The top 5 brands hold 52% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 55/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

stem toys market data

Units sold / yr: 6K–8K; avg 100–250/product
Revenue / yr: £118K–£158K; units × avg price
Conversion rate: 2.1%
Avg BSR: #155
Page quality: 0%
Prime: 98%
Sponsored: 96%
Out of stock: 6.6%
Avg brand age: 38 months
Avg seller age: 181 days

Competition & brand share

The top 5 products take 42% of clicks — established leaders, but buyers still shop beyond them.

Brands

30 falling

Sellers

110

Top-5 brand share

52%

Top 20: 93%

Top-5 click share

42%

Top 20: 79%

Open market

43%

ADUSRIZ23%
SCIENCE DIARY11%
ThinkFun6%
CONSTRUCT & CREATE6%
Science Kidz6%
Lypsochaat6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -7.7% search growth over the last 90 days.

Peak months: Nov, Dec · busiest ÷ quietest = 7.3×

Open Trend

Top stem toys search terms

stem toys128K/yr -15.8%1.0% conv.
stem60K/yr -1.2%0.6% conv.
stem toys age 1057K/yr -10.7%1.7% conv.
stem toys age 851K/yr -18.2%2.0% conv.
stem kits20K/yr +19.0%1.9% conv.
stem toys age 716K/yr -4.7%1.7% conv.
stem kit10K/yr +3.6%1.6% conv.
stem kits for kids age 8-108K/yr +36.3%2.5% conv.
stem kits for kids age 12-148K/yr -0.5%1.0% conv.

All search terms

Top stem toys 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

STEM Toys Age 8+ Wooden Engineering Science Experiments kit(6 Pack Set)

ADUSRIZ£18.424.5★459 rev

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£18.464.6★172 rev

STEM Toys Age 8+ Wooden Engineering Science Experiments kit(6 Pack Set)

ADUSRIZ£18.784.2★189 rev

ThinkFun Gravity Maze Falling Marble Challenge Logic Brain Game and STEM Toys for Kids and Adults Age 8 Years Up - Gifts for Children

ThinkFun£16.914.5★2,605 rev

CONSTRUCT & CREATE Hydraulic Cyborg Hand DIY STEM Build Your Own Project Kit Set

CONSTRUCT & CREATE£25.194.6★1,064 rev

Newest

by launch date

Amteker DIY Remote Control Car Building Kit for Kids Age 8-12 Wooden Engineering Science Toy for 8 Year Old Boy Back to School Gifts Rc Drift Car with Self-Centering Steering Build & Race Boys Gifts

Amteker£14.081,292 rev

2mo ago

STEM Toys for Ages 6-8-13 Science Kits DIY Building Your Own Radio Crafts for Kids Stocking Stuffers Birthday Gifts for 9 11 12 14 15+ Year Old Boys Girls Teens Circuit Engineering Electronics Project

ALNIYATX£14.0328 rev

9mo ago

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£18.46172 rev

10mo ago

GALT Energy Lab Kids Science Kit with 7 Fun Hands-On Physics Experiments

Galt£11.2338 rev

11mo ago

STEM Projects for Kids & Adults Build Your Own Bluetooth Speaker - Science Experiment Electronics Kit | Beginners Starter DIY Set STEM Gifts for Teenage Girls + Boys Ages 10 and Up (Dual Speakers)

ALNIYATX£13.8535 rev

1y ago

What buyers say about stem toys

What buyers praise and complain about, mined from review topics.

What buyers love

Fun/Entertainment Experience26%

“this has kept him highly entertained”

Gifting Purpose17%

“It was a gift”

Quality-Overall10%

“The quality of the cube is good, it feels strong and well made”

Value For Money7%

“Good price”

Educational-Overall7%

“Fun educational gift”

Creativity4%

“Encourages creativity”

Instructions/User Manual/Troubleshooting4%

“The instructions were clear”

Ease Of Use3%

“Easy to use”

Design-Overall2%

“thoroughly enjoyed building it”

Assembly/Installation2%

“Easy to put together”

What buyers complain about

Size-Overall11%

“Very small parts”

Quality-Overall10%

“Okay, a little cheap in quality”

Instructions/User Manual/Troubleshooting9%

“The instructions arent great and myself and my son are very capable so its not on us”

Value For Money8%

“Its expensive for what you get”

Functionality-Overall6%

“Didn't work”

Defective Material/Parts5%

“In my opinion the gearbox of the kit has faulty gear parts”

Durability5%

“has died after one day”

Advertised Vs Actual Product4%

“Picture is misleading”

Assembly/Installation4%

“still very finicky to put together”

Wheel Quality3%

“unfortunately one of the wheels is faulty”

Top return reasons

Size-Overall16%

Defective Material/Parts15%

Gifting Purpose15%

Functionality-Overall7%

Quality-Overall7%

Instructions/User Manual/Troubleshooting6%

Advertised Vs Actual Product6%

Value For Money5%

Product Condition4%

Compatibility-Overall2%

Common questions

Is stem toys profitable to sell on Amazon United Kingdom?: The niche generates £149K/yr across 46 tracked products. 4 of 7 products launched in the last 360 days are still selling. 90-day search growth is -7.7%. Flapen's verdict: Worth a look (55/100).
How competitive is the stem toys niche?: 30 brands and 110 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 52% of demand.
What do buyers complain about in stem toys?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Instructions/User Manual/Troubleshooting. The return rate is 1.0%.
When does demand for stem toys peak?: Demand peaks in Nov–Dec; the busiest month runs 7.3× the quietest.
What does it cost to enter the stem toys niche?: Listings span £7.09–£41.87; the average listing price is £19.72 (sweet spot $15–$100). The average incumbent carries 3,523 reviews — the moat a new listing must climb.