3D Digi-Draw looks like a really fun toy! I've always found drawing to be a challenge, and something like this might have been helpful when I was a kid. The product description says it can be used for 3-d objects, but I wonder what it does with perspective. I might get one just to try it out myself :-)
Mechanically, it looks nice and simple, with no batteries or power requirements. Nice!
I't's more color theory than chemistry, but it's a great bath toy!
How could I resist inflatable planets? I think I'll be ordering a set for my kids....who am I kidding, I want them in my office.
I'd probably not use the sun in this set, since the scale is so far off..the real sun is nowhere near the same size as any planets ;-)