Did you know that there is a whole website dedicated to Dollar Store Crafts? Even better, they have their projects broken down into price categories, the one I like is the $1-free section, lol.
I saw this idea of using a shower curtain (liner) as a play mat, you can draw designs on it and let the kids color the whole thing. What a great idea for those cold days that you are stuck indoors. It might be a little better for older kids who understand coloring a little better, but still cute! Just thought I'd share.