Yesterday, while it was still good, and hot, we took our math lesson outside, with a bucket of water, and a couple of kitchen sponges, that I cut into various shapes.
The little ones played at making patterns on the driveway...
...and turned the shapes into pictures.
The best part was, they thought they were having a good, sloppy, painting kind of time, but within minutes after we were back inside, the entire "mess", had evaporated away.
It's great to be a homeschooler.