Bought for a fun craft at a birthday party, was fairly easy to do, but they literally dry out after a day and are crunchy... not bouncy. INot worth the plastic in my opinion.

I bought these for loot bags. 3 of the 12 kits stayed home with us. Out of those three, only one had two correct pieces for the ball mould. The other two each had two pieces that were the same halves of the mould, meaning they could not be snapped together. The kits are awesome and fun, but only if you have the right parts to do it. Who knows what I sent out in the other loot bags, because of course you can’t tell that the wrong parts are in the little sealed containers that I dropped into the loot bags. Hopefully we didn’t end up with 9 disappointed party guests. :(We did use our one working mould to make a couple of balls though, and it was easy and fun. So again, fun idea! But less fun if you don’t have the right pieces to actually do it.

Bought these bouncy balls for a birthday party. It was fun making them with the kids online, but after a few days they no longer bounced. They became as hard as a rock. So unfortunate. We spent all that money and ended it up with a piece of garbage. It's pretty sad when you consider how happy your kid is that they made a bouncy ball only to find that it doesn't bounce after a few days. Imagine your child trying to play with it and it just drops like a stone on the floor. So sad.

The balls are easy to make and come out really cute and very bouncy once they are done. HOWEVER, within 24 hours, they become hard as a rock. I don’t know if we got a bad batch or what happened but they are not bouncy balls.

Not bouncy what do ever. Instructions are simple and I made a few of them before putting the stuff on a shelf. They don't bounce at all lol. Leave em out for a night by accident and you're left with a rock. How these have great ratings, I have no clue..