Big Bouncy Ball Kit for Kids, FunKidz DIY Ultimate Magic Bouncy Balls Making Kit Science Craft Projects Birthday Party Activities for Boys Girls Ages 6-12 Includes Tennis Size Ball Model and Powder

Great gift for kids. Dries up quick so put it in a zip lock bag to keep it bouncy

I used this for a camp activity and the children enjoyed it. Its easy to make and a good hands on activity.

Although I feel it’s best suited for 8+ year olds, my 6 & 3 yo loved it! Finished balls were colorful and had good bounce. It takes time to make them and definitely need adult assistance. The molds are very difficult to keep closed. But overall a fun project.

Such great fun! I’m delighted to have dinner that my grandson and I can make our own superballs!

The process itself is quite simple with one major problem: I could not put the molds together! For one, they are made of thin cheap feeling plastic and I was afraid if I put too much pressure on them, they'd break! Fortunately my husband was able to do the job so that my daughter could create her first two. Also, FYI, the kit says it makes 24 balls but, although there are 24 packets of crystals, I only used ~1.5 packets to make the first 2 balls. Here's to hoping the molds hold up. Also, there was no way the balls were ready in 40 minutes of dry time. They were much better after several hours, but we waited overnight for good measure. They do bounce, but not very high (I find this a good thing actually, so that hopefully they don't get lost). Like another reviewer, I also found them to be quite small, although comparable to a ball you'd get in one of those toy machines you put quarters in.

Was perfect thing to spend some craft time with my grandkids (6) & (3) they loved it.

On toxicity: Product box claims that it contains chemicals that are harmful if swallowed and that could cause moderate skin irritation. Box directs that you need to follow the individual packaging in case of poisoning. Individual packaging is blank. So, if you get poisoned you will have to be treated for a unknown chemical, which delays proper treatment that could have come with appropriate warnings. The product itself: It just kinda sucks. The "tennis ball size" mold (in review picture) is maybe 60% the size of a tennis ball and the molds have these huge spikes that create holes and make it difficult to remove from the mold without damaging it. Directions tell you to fill the mold 90% of the way and when the crystals settle during melting you're left with a huge void at the top where there should be bouncy ball poison. Avoid this 0-star product at all costs until Amazon is able to remove it from their listings.

Must leave out to dry