Make your own glow in the dark chalk

A couple of weeks ago Chuck and I were perusing the Halloween aisles at Target (for the bajillionth time... what can I say?  It's my favorite holiday!) and I spotted a pack of glow in the dark chalk.

Then a light bulb went off in my head.  I could buy the chalk... but it'd be more fun to try making my own.  So after tinkering around for a bit.... I came up with this result. 

Ooh!  It glows!

What what?  Yup.  They glow after you "charge" them with light.  Just doodle a design at night, shine a light on them to "charge" them, and then turn off your light.  Your doodles should glow for a bit and then you'll need to charge them again.  

To make this novelty chalk, I simply modified this homemade chalk recipe.  Instead of tempera paint, I added 3 T of glow in the dark paint to the mixture.  Here's what my chalk looked like setting up:

Have a great weekend!