My favorite rotation was on Samuel. We used the PC(USA) Bible school material (it might have been "God's Brave People")for alot of the lesson plans.
Art Idea
I had the younger children decorate a robe made out our craft fabric (it's like plastic-lined paper towel and comes on a large roll - costs about $20). The younger children focused on Samuel outgrowing his robe and his mother bringing him a new one every year. One of the boys wore his "robe" in worship and I had him explain to the congregation what it was.
Update: they sell paper robes/gowns.
Mission Project Idea
You could do a mission project and have the children bring outgrown clothes for a local charity.
Music Idea
My favorite part of this rotation was illustrating the hymn "Here I Am, Lord" on transparencies. Each class did a verse, then we showed these in worship and the congregation sang the hymn as I showed the pictures. There wasn't a dry eye in the house! Samuel is a wonderful rotation - you and your kids will enjoy it!