Is slime kit profitable to sell on Amazon United Kingdom?

The niche generates £158K/yr across 30 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -4.2%. Flapen's verdict: Worth a look (51/100).

How competitive is the slime kit niche?

15 brands and 54 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 80% of demand.

What do buyers complain about in slime kit?

Top complaints mined from reviews: Adhesion/Stickiness, Value For Money, Quality-Overall. The return rate is 0.4%.

When does demand for slime kit peak?

Demand peaks in Oct–Nov–Dec; the busiest month runs 3.6× the quietest.

What does it cost to enter the slime kit niche?

Listings span £3.17–£22.36; the average listing price is £13.07 (sweet spot $15–$100). The average incumbent carries 1,319 reviews — the moat a new listing must climb.

slime kit

Worth a look

Shows low returns (0.4%), but soft demand (-4.2% this quarter) keeps it on the watch list.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Avg price

Good£13.07

avg listing price — sweet spot $15–$100

Competition

Good50%

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

Review moat

Good1,319.2

avg incumbent reviews — the moat a new listing must climb

Conversion

Good4.2%

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

Brand share

Okay80%

top-5 brand share — brands hold most of the demand

Price range

Okay£3.17–£22.36

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

Market size

Okay£158K

£158K/yr · 287K searches

Growth

Bad-4.2%

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

According to Flapen's Amazon United Kingdom niche tracking, slime kit is a £158K/yr Amazon United Kingdom market (287K searches/yr). The top 5 brands hold 80% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Worth a look — 51/100.

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

slime kit market data

Units sold / yr: 13K–15K; avg 250–500/product
Revenue / yr: £163K–£196K; units × avg price
Conversion rate: 4.2%
Avg BSR: #85
Page quality: 0%
Prime: 100%
Sponsored: 77%
Out of stock: 6.1%
Avg brand age: 31 months
Avg seller age: 200 days

Competition & brand share

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

80%

Top 20: 100%

Top-5 click share

50%

Top 20: 88%

Open market

17%

YOPINSAND31%
iKidiki26%
Elmer's17%
Original Stationery4%
Galt3%
Funewest3%
Open — no brand owns it (9 brands, 17%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.2% search growth over the last 90 days.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.6×

Open Trend

Top slime kit search terms

slime making kit203K/yr -5.3%4.0% conv.
slime making16K/yr +15.4%3.0% conv.
slime making kit for girls20K/yr -1.6%4.3% conv.
make your own slime10K/yr +11.1%3.5% conv.
slime maker12K/yr -5.1%1.7% conv.
make your own slime kit11K/yr -17.8%3.7% conv.
diy slime kit6K/yr -17.2%2.1% conv.
slim kit5K/yr -19.0%3.5% conv.
fluffy slime kit4K/yr -20.0%0.9% conv.

All search terms

Top slime kit 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

Elmers Colour Changing Slime Kit | Slime Supplies Include Colour Changing Glue & Magical Liquid Slime Activator | Activates with UV Light | Washable & Kid Friendly | 4 Count

Elmer's£12.184.4★1,245 rev

DIY Slime Kit Galaxy Slime Making Kit for Girls Gift Toy for Kids 3-12

YOPINSAND£13.094.2★597 rev

iKidiki Slime Making Kit Toys for 6 7 8 9 10 11 12 Year Old Girls Boys Gifts Birthday Galaxy Slime Kits for Girls 6-12 Year Old Girl Boy Gifts Fluffy Slime Kids Birthday Presents Craft Kits for Kids

iKidiki£15.824.2★214 rev

Ice Cream DIY Slime Kit for Girls Butter Foam Cloud Slime with Add-ins

YOPINSAND£13.124.2★605 rev

iKidiki Slime Making Kit for Girls Boys Toys for 6 7 8 9 10 11 12 Year Old Girls Boys Gifts Birthday Galaxy Slime Kit 6-12 Year Old Girl Boy Gifts Magic Potions Making Kit Children Fluffy Slime

iKidiki£20.454.5★169 rev

Newest

by launch date

8 Cups DIY Slime Kit Slime Kit for Girls Glow in The Dark Clear Slime

YOPINSAND£7.4428 rev

7mo ago

18 Pack DIY Slime Kit Slime Making Kit for Girls Premade Clear Slime

YOPINSAND£8.7222 rev

7mo ago

12 Cups DIY Slime Kit Slime Kit for Girls Glow in The Dark Clear Slime

YOPINSAND£8.11395 rev

1y ago

gyoyede DIY Slime Making Kit Supplies 160 Pack Slime Kit Mix Ins Accessories Slime Add Ins Foam Glitter Charm Bulk Fishbowl Beads Containers for Making Coloring and Party Decorations

gyoyede£13.2817 rev

1y ago

iKidiki Slime Kit 6 7 8 9 10 11 12 Year Old Girl Gifts Galaxy Slime Making Kit Party Bag Fillers for Kids DIY Cloud & Butter Slime With a lot of Cute Decorations

iKidiki£16.8977 rev

1y ago

What buyers say about slime kit

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

What buyers love

Quality-Overall26%

“Good Quality”

Fun/Entertainment Experience18%

“lots of fun”

Gifting Purpose10%

“Great for a gift”

Value For Money9%

“Worth the money”

Developmental Needs4%

“Good for kids”

Ease Of Use4%

“Easy to use”

Adhesion/Stickiness4%

“it produces non-sticky slimes”

Advertised Vs Actual Product3%

“Item exactly as described”

Efficiency2%

“Amazingly successful”

Size-Overall2%

“The lids fit on the pots well”

What buyers complain about

Adhesion/Stickiness18%

“Not sticky at all”

Value For Money14%

“Over priced”

Quality-Overall7%

“Very poor quality”

Texture/Consistency-Overall6%

“Awful slime, the texture was like honey for every pot”

Functionality-Overall6%

“Didn't work”

Advertised Vs Actual Product6%

“Doesnt match the description”

Size-Overall5%

“It's very small”

Smell4%

“Two scents completely empty”

Moist/Dry4%

“Clay was dry”

Instructions/User Manual/Troubleshooting4%

“instructions weren't any better”

Top return reasons

Leak-Proof22%

Adhesion/Stickiness17%

Functionality-Overall12%

Advertised Vs Actual Product7%

Size-Overall6%

Defective Material/Parts5%

Gifting Purpose4%

Moist/Dry4%

Quality-Overall2%

Smell2%

Common questions

Is slime kit profitable to sell on Amazon United Kingdom?: The niche generates £158K/yr across 30 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -4.2%. Flapen's verdict: Worth a look (51/100).
How competitive is the slime kit niche?: 15 brands and 54 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 80% of demand.
What do buyers complain about in slime kit?: Top complaints mined from reviews: Adhesion/Stickiness, Value For Money, Quality-Overall. The return rate is 0.4%.
When does demand for slime kit peak?: Demand peaks in Oct–Nov–Dec; the busiest month runs 3.6× the quietest.
What does it cost to enter the slime kit niche?: Listings span £3.17–£22.36; the average listing price is £13.07 (sweet spot $15–$100). The average incumbent carries 1,319 reviews — the moat a new listing must climb.

slime kit

slime kit market data

Competition & brand share

Demand & seasonality

Top slime kit search terms

Top slime kit products on Amazon

Top sellers

Newest

Trending

What buyers say about slime kit

What buyers love

What buyers complain about

Top return reasons

Common questions

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