Crazy Aaron's Thinking Putty is a lot like the Silly Putty you remember. You can squish it, bounce it, stretch it, snap it... but Thinking Putty is extra special. Firstly, you get wayyyy more of it (over 4 ounces!). Secondly, they all have special properties. Foxfire is UV sensitive, so it glows AND you can write on it with a blacklight (included)! Whoa. Recommended for ages 6 and up.
Foxfire Thinking Putty