Comments on: Mystery Toy

By: Lydia Fancher

Lydia Fancher — Mon, 23 Jan 2012 16:23:04 +0000

I used a rock from my backyard and I cut two rubber bands and I put glue to keep it there and it was hard to put the paper clip through the hole :/ I am still making it…

By: Carolyn Penkert

Carolyn Penkert — Sun, 22 Jan 2012 07:18:16 +0000

My kids enjoyed this experiment, however we may need to put a larger Hex Nut in the can since it keeps rolling if you push too hard. We are having a Blast!

By: Jia Zhi Chien

Jia Zhi Chien — Sat, 06 Aug 2011 21:50:47 +0000

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii like it

By: Aurora

Aurora — Wed, 22 Jun 2011 13:11:54 +0000

Yes – it’s a much larger mass to move. Try rocks? In a baggie perhaps?

By: Joni Lee

Joni Lee — Wed, 22 Jun 2011 12:21:54 +0000

Will this work with a large oatmeal container. If so, do I need to increase the size of the hex nut?

By: Aurora

Aurora — Mon, 01 Mar 2010 20:40:52 +0000

Wow – cool! Sounds like you figured something worthwhile out!! Good job persisting until you got the result you were after. That’s a key quality in a scientist.

By: Michelle Carr

Michelle Carr — Mon, 01 Mar 2010 19:33:27 +0000

We tried and tried and tried to get this to work. We changed the number of rubberbands, we tried making it without the knot, and finally tried a very large and heavy hexnut. NOW it works! Before it would just roll in one direction and not come back (it was a lobsided roll…it would roll, hesitate, roll, hesitate). Weight seems to make the difference. It will stop on its own and then roll backwards.

Thanks, Aurora!

By: Debra Thomson

Debra Thomson — Wed, 11 Nov 2009 19:46:37 +0000

If you roll it and do not stop it with your hand after it comes back to you, will it keep on rolling and coming back, rolling and coming back on and on? Thank you! I am DeFiNaTeLy making this!

By: sevy keble

sevy keble — Wed, 11 Nov 2009 00:57:33 +0000

Wow! Just as good as “Plasma Grape” and “Microwaving Soap.”! If you roll it to hard and it goes to far……it won’t come back to you. I know why it comes back! The rubber band gets wound up inside and then comes back. (I hope that’s a simple and quick explanation:)) Aurora, what do you think?
sevy keble