If you're looking for a fun weekend craft project to do with the kids, try this one: You work with a special type of polymer clay from the craft store that, when baked, becomes a pencil eraser!
The clay my daughter and I used for this project is Sculpey Amazing Eraser Clay. It comes in a six-pack and includes a roller and a sculpting tool. Molds are available for easy shaping, but we just used our fingers and our imaginations.
It retails for $7 for a set of six colors. You can read more, and get project ideas at www.sculpey.com.