We were talking about rain. So we painted with bubble wrap.
Wrap a block with bubble wrap. Fold a paper towel and place in shallow pans. Pour paint into the pans. Note: Dampen the towels before adding paint. We didn't so the towels stuck to the bubble wrap and pulled up out of the pans. You can just put paint in the pans, but the paper towels create a "stamp pad" effect and you will end up using less paint with them.
Kids press the bubble wrapped blocks into the paint and then onto their paper. Some kids like to stamp with the bubble wrap.
Some like to move and swish with the wrapped blocks.
Either way, you can create a rain or storm effect. (The bubble wrap we had this time has huge bubbles. In the past we've used smaller bubbled wrap that looks more like rain.)
It's a fun process experience. And it creates really cool paintings.
And you can push and push and push. But those bubbles will not pop under the block.