Snails are abundant where I live. One of my favorite activities to do with my daughter, Frida, is look for snails after a rain.
The Snails and Slugs page over at Backyard Nature is a very good source of information on snails. This site has many fun Snail activities such a making a terrarium for snails (see pictures above and below). The absolutely best page on fun teaching about Snails is here. Frida is still a bit young to appreciate most of the experiments, however, I think I could coax her into examining snails with a magnifying glass and/or maybe into a short snail race.

