Check this stuff out! It reminds me a little of Moon Sand, but it doesn't fall apart like Moon Sand.
Here is the Bubber in a 'blow up' sandbox. It's really cool because it has a cover that has Velcro around the edges, so you can close it up really easily.
I got these cool stamps from Lakeshore and have been wanting to use them forever. I just don't want to mess with play-doh because it dries out. I tried clay, but it was too hard for the kids to press into.
The kids use these stamps to make words in the Bubber.
It gets better than that! You can also use sand toys to make cookie like letters and it holds together!