Believe it or not, there was a time when they got as excited over the craft caddie as they did over pizza boxes.
One of their favorite summer time crafts was water color splatter art.
It's a craft that's so easy and great for a rainy day.
On regular printer paper, let them paint a picture with water color paint.
Allow to dry, then crumble like you're going to throw it in the trash. Yep, just wad it up in a ball. They can even bat it around for a bit, though if they're like mine, that will mean broken furniture.

Lay out on a table covered with a towel (so they don't stick) and allow to dry.
After they dry, they are softened and even the oddest paintings can become abstract works of art.
Did you know that most colored pencils work like paint if you dip them in water?
Sunday is Mother's Day, so...