Fimo and Polymer Clay
The is a craft I've recently started dabbling in. It's very enjoyable. I do find the raw materials quite expensive, and it's definitely a craft for when the boys are asleep! You can get fimo or one of its many counterparts online or a good craft shop.
I have been doing cake toppers for friends and family.Princess Holly for KatieGaston for ElishaMonkey for Iona