Another possibility is Sculpey, or a similar harden-upon-baking clay. Sculpey seems to be better than Model Magic in the finished product, and also doesn't air-dry.

Sculpey III seems to be a bit softer than previous versions, but you may still find that it is slightly too hard for your little one. You can use softener, or you can roll it into little balls (which is a good way to store it, in a zip-lock bag) and zap each colored ball for a couple of seconds in the microwave, which keeps it plenty soft for an art session.

Edited by Iucounu (10/21/10 05:51 AM)
Striving to increase my rate of flow, and fight forum gloopiness. sick