Hunting for craft ideas

What's a fun craft? Well the messy ones are usually good, up until its time to clean that is.  I am a mom of a mild mannered, little helper, 8 year old girl and a wild, dirty, selective hearing 2 year old boy. Thus, making it hard to find crafts that they both can do together. So I will be on a hunt this week to hopefully find a few (I would take just one) crafts for us to do as a trio!