Lindsay of Filth Wizardy, a kids crafting site, explains the finer points of making art with ordinary snails and (presumably, non-toxic) food coloring. After wrangling snails from your yard, it seems you can simply dip them in the food coloring and let them loose on a big piece of white butcher paper.
Voila! You have snart.
You're welcome!
Next up, snart facial massages.
via Boing Boing
How to Make Snart (Snail Art)