I want to buy refills. what size gumballs should I buy? The small ones- dime size? or the large ones about size of a quater?

Thank you for your question! The gumballs that fit in the Gumball Machine Maker are about 5/8" (0.6"), so slightly smaller than a dime.

I use it with our marbles and marble run. Beware, however, some tricks just don't work well with the weight of the marbles. Luckily, my son loves it when the marbles fly off the track anyway.

Do you have a link to purchase refill gumballs?

I bought the dubble bubble 20oz gumball machine refill

How tall is the completed gumball machine?

The built Gumball Machine stands at 17 inches tall.

Thames And Kosmos Gumball Machine Maker

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎉 Build, learn, and wow—your physics playground in a gumball machine!

READY TO ROLL - Includes starter gumballs and clear globe dispenser for instant, hygienic play.
PHYSICS IN ACTION - Explore Newton’s laws, momentum, and energy transfer through hands-on mechanical stunts.
INTERACTIVE LEARNING - Trial-and-error design challenges sharpen problem-solving and STEM skills.
ENDLESS CUSTOMIZATION - Rearrange modular tracks to engineer your unique gumball coaster every time.
SLEEK DURABLE DESIGN - High-quality plastic components ensure smooth, consistent performance and lasting fun.

The Thames & Kosmos Gumball Machine Maker is a STEM-focused physics kit that lets users build customizable gumball tracks featuring stunts like pulleys and pinball launchers. Designed for kids 6+, it teaches mechanical physics concepts through hands-on trial-and-error play. The kit includes modular plastic track segments, a clear dispenser globe, and standard 16-mm gumballs, combining educational value with engaging, interactive fun.

Specifications

ASIN	B07P681B7K
Age Range Description	Toddler,Kid
Best Sellers Rank	#23,164 in Toys & Games ( See Top 100 in Toys & Games ) #187 in Educational Science Kits
Brand Name	Thames & Kosmos
Customer Reviews	3.9 3.9 out of 5 stars (2,345)
Educational Objective	Physics, Problem Solving Skills, Trial-and-Error Learning
Global Trade Identification Number	00814743014121
Included Components	plastic track segments, rubber bands, plastic storage globe in two parts, manual, 5/8-inch gumballs, manual
Is Assembly Required	Yes
Item Dimensions	13 x 2.5 x 11.5 inches
Item Type Name	Physics STEM Experiment Kit
Item Weight	1.6 ounces
Manufacturer	Thames & Kosmos
Manufacturer Maximum Age (MONTHS)	360.0
Manufacturer Minimum Age (MONTHS)	72.0
Manufacturer Part Number	550101
Manufacturer Warranty Description	1 Year Warranty Against Manufacturer Defects
Material Type	Plastic
Model Number	550101
Set Name	Gumball Machine Maker
Size	Medium
Theme	Physics
UPC	814743014121
Unit Count	1.0 Count

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