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ztiger
2025-09-05 17:29:15
Good replacement ball bearings for Gravity Maze.These are slightly bigger than the originals by maybe a millimeter but they still work just fine.
Jonathan
2025-08-16 18:16:21
Perfect fit for the gravity maze game. There are enough of them that loosing a few will still keep the game playable. My kids love them.
PH LaAz
2025-07-06 09:12:24
Needed replacements for Gravity Maze game. These are the perfect size ðŸ‘ðŸ¾ðŸ‘ðŸ¾ðŸ‘ðŸ¾ðŸ‘ðŸ¾
Ronaldsmith
2025-06-24 10:57:20
I return the 1/2 " (.05mm) four brothers gravitrax replacement balls today at the whole foods market at H ST NE Washington DC. The balls were to small, thank for your help
Lilygirl
2025-06-18 14:06:25
We really needed these for the gravatrax. So glad they had them and shipped them quickly. Good quality
christy young
2025-06-01 14:06:24
Too small
chelle
2025-05-25 18:44:02
I bought these specifically to replace the missing balls from a Q Ba Marble Run set. I was disappointed that they are a little too big and wouldn't go through the run properly, if at all. If that is what you are looking for, keep looking. I gave it 4 stars because there was a cut in the bag when I received it, which the marbles could have gotten out of. Otherwise, the problem was my own, as they did not advertise that they would work for Q Ba.
Lori
2025-04-04 18:41:09
Perfect addition to the gravitrax mazes. Needed more balls. They are spot on.
Julia B Mc
2025-03-29 11:34:55
We bought our sons the Gecko marble run products. Gecko only includes a limited amount of balls and does not sell replacement balls. I ordered these and they are the right size and weight to work replacement marbles for the Gecko run marble mazes. Good quality marbles.
SHamilton
2025-03-08 16:22:06
Purchased these for someone's science project, as they were used to build a Newton's Cradle. Worked exactly as needed.
Raphael Bida
2025-02-11 16:19:00
My grandson like it
Funmi Ajibade
2025-01-15 15:53:58
Son loves
Hebat
2025-01-13 12:53:45
Good quality
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