Yes, it might be sad that I was watching a Scooby-Doo movie on Cartoon Network. And it may be even sadder that the only reason I stopped to watch it was because the actress for Velma was also a character in the Disney Movie Lemonade Mouth. BUT WHATEVER, the point is that while watching this cool Scooby movie, I saw a commercial for Crayola glow in the dark chalk! Yes, this is a real and wonderful thing.
Can you imagine all the cool things you could draw on your driveway!? When I was younger, me and my friend would spend hours on her driveway just covering it in random pictures. So fun. Here's the commercial I saw:
There's also a how-to glow chalk demo.