Thinking Putty

We were a bit skeptical of this one because it seems a little pricey for putty. But the reviews, which all seem unbiased, really convinced us. The only complaint we saw was that the glow-in-the-dark putty doesn’t glow much. This is a really popular brand, so there are a lot of options available on Amazon. We do love this homemade version of thinking putty, too.