Knex
FailThe top 5 brands take 100% of clicks, so Knex is a Fail.
- Flapen Score
- 44 / 100Ranks 850 of 1,773 Toys & Games niches · on the category median44
- Market size
- £221K/yr264K searches / yr
- 90-day growth
- -19.5%search demand this quarter
- Competition
- 57%top-5 click share · 3 brands · 76 sellers
Flapen Score
Knex against its category
The dotted line is the Toys & Games average. Past it, Knex is stronger. Inside it, weaker.
Market
The Knex market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Knex 264K times last year and spent an estimated £221K. All 3 brands take every click. Demand peaks in Oct–Nov–Dec. Flapen scores it 44 out of 100, a Fail.
01 · Demand
An estimated 4.4% of those searches ended in a purchase.
Shoppers searched for this 264K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 4.4% of those searches ended in a purchase. Searches in the last 90 days moved -19.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated £221K a year.
- Searches, last 12 months
- 264K
- Growth, 90 days vs prior 90
- -19.5%
- Conversion, latest week
- 4.4%
- Market size, estimated
- £221Ka year
- Peak month
- December6.8× the quietest month
- Top search term
- knex161K searches a year
02 · Price
A sale here is worth £19.04.
Listings sell for £19.04 on average, from £8.00 to £38.11. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 250 to 500 of them. At £19.04 that is £5K to £10K a year per listing.
- Average price
- £19.04inside the $15 to $100 sweet spot
- Price range
- £8.00–£38.11
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 10K–13K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £5K–£10K
- Returns
- 1.1%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
67% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.6% of listings are out of stock. The average listing ranks #649 within Building & Construction Toys. It carries 1,825 reviews at 4.54 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 67%
- Prime listings
- 100%
- Out of stock, average day
- 0.6%
- Average rank
- #649in Building & Construction Toys
- Average rating
- 4.54 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 1,825per listing
- Listings tracked
- 18
04 · Newcomers
1 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 38 months on average, so the names here are settling in.
- Launched, last 12 months
- 2
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 38 months
Products
Top Knex products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 29, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Basic Fun KNEX | Creation Zone Building Set 50 Model | 417 Piece Educational Learning Kit with Storage Tub Engineering Construction Toys for Kids 5 16511
- Price
- £24.37
- Rating
- 4.4/5
- Reviews
- 2,293
- Age
- 9y ago

Basic Fun KNEX Ultimate Building Set 35 Model Educational Toys for Kids 480 Piece Engineering and Construction STEM Learning Kit for Children Ages 7+ (Packaging may vary)
- Price
- £17.00
- Rating
- 4.6/5
- Reviews
- 6,135
- Age
- 12y ago

KNEX | Fun Fast Vehicles Building Set 10 Model Beginner | Construction Toys for Sensory Play 96 Piece Stem Learning Kit Educational Toys Suitable for Girls and Boys Ages 5+ | Basic Fun 45510
- Price
- £8.00
- Rating
- 4.4/5
- Reviews
- 2,706
- Age
- 8y ago

Basic Fun KNEX Click and Construct Value Building Set with Storage Tub Educational Toys for Kids 522 Piece Stem Learning Kit Construction Toys for Kids Aged 7+ (Packaging may vary)
- Price
- £26.27
- Rating
- 4.4/5
- Reviews
- 2,604
- Age
- 8y ago

Basic Fun - KNEX Beginner Building Set 40 Model Educational Toys for kids 141 Piece Beginners Learning Kit Engineering for Children Ages 5+(Packaging may vary)
- Price
- £12.81
- Rating
- 4.7/5
- Reviews
- 2,433
- Age
- 7y ago
Trending
estimated 90-day click momentum
Basic Fun KNEX Custom Cruisers Building Set 30 Model STEM Construction Kit with 105 Pieces & Storage Bag Creative Toy for Kids Aged 7+
- Price
- £13.67
- Rating
- 4.6/5
- Reviews
- 1,441
- Age
- 11mo ago

Basic Fun KNEX Deluxe Building Set 408 Piece STEM Kit with 80 Model Ideas & Storage Bag Educational Construction Toy for Kids Aged 7+
- Price
- £21.33
- Rating
- 4.4/5
- Reviews
- 80
- Age
- 11mo ago

Basic Fun KNEX | Cyborg Creatures 15 Model | Educational Toys for Boys and Girls 196 Piece Stem Learning Kit Engineering for Kids Fun Colourful Construction Toys for Children Ages 8 12463
- Price
- £11.76
- Rating
- 4.6/5
- Reviews
- 52
- Age
- 3y ago

Basic Fun KNEX | Beginner Building Set 10 Models | Educational Toys 125 Piece Stem Learning Kit Engineering for Kids Construction Toy for Children Ages 7 80206
- Price
- £9.49
- Rating
- 4.5/5
- Reviews
- 277
- Age
- 6y ago

KNEX | KNexosaurus Rex Building Set (Motorised) | 255 Piece Moving Dinosaur Model Building Set Construction Toy STEM Learning Educational Toy for Children Boys and Girls Ages 7+| Basic Fun 12468
- Price
- £21.86
- Rating
- 4.5/5
- Reviews
- 207
- Age
- 3y ago
Newest
by launch date
Basic Fun KNEX Custom Cruisers Building Set 30 Model STEM Construction Kit with 105 Pieces & Storage Bag Creative Toy for Kids Aged 7+
- Price
- £13.67
- Rating
- 4.6/5
- Reviews
- 1,441
- Age
- 11mo ago

Basic Fun KNEX Deluxe Building Set 408 Piece STEM Kit with 80 Model Ideas & Storage Bag Educational Construction Toy for Kids Aged 7+
- Price
- £21.33
- Rating
- 4.4/5
- Reviews
- 80
- Age
- 11mo ago

Kids STEM Building Toys for 4-8 6-8 Building Blocks STEM Kit Ages 3 4 5 6 Year Old Boys Gift Educational Engineering Construction Blocks Toy Creative DIY Activities Gmae for Boys Girls (125PCS)
- Price
- £20.51
- Rating
- 4.5/5
- Reviews
- 119
- Age
- 2y ago

Basic Fun Kid KNEX | Zoomin Buddies 20 Model | Kids Craft Set with 48 Pieces | Educational Toys for Kids Fun and Colourful Building Toys for Boys and Girls Construction Toys Ages 3 85053
- Price
- £15.94
- Rating
- 4.6/5
- Reviews
- 1,127
- Age
- 3y ago

KNEX | KNexosaurus Rex Building Set (Motorised) | 255 Piece Moving Dinosaur Model Building Set Construction Toy STEM Learning Educational Toy for Children Boys and Girls Ages 7+| Basic Fun 12468
- Price
- £21.86
- Rating
- 4.5/5
- Reviews
- 207
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 57% of clicks. Leaders hold, but buyers still shop past them.
Brands
3 flat
Sellers
76
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
57%
Top 20: 100%
Open market
0%
- Basic Fun49%
- K'NEX49%
- Lypsochaat2%
- Open — no brand owns it (0%)
Demand
Knex search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Oct, Nov, Dec · busiest ÷ quietest = 6.8×
Search terms
Top Knex search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- knex161K/yr
- knex building set28K/yr
- kinex15K/yr
- knex age 512K/yr
- knex sets9K/yr
- k nex10K/yr
- kinex building set8K/yr
- k nex set6K/yr
- connex3K/yr
- knex age 77K/yr
Reviews and returns
What reviews say buyers love and hate about Knex
We read the reviews and the return reasons for every product selling here.
“Its quite big”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
18 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Knex questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









