We don't have sand handy, so I used sugar and food coloring.
We haven't experienced much sand in the past two and a half years, so Kewpie was fascinated with the way it moves and feels on your hands. I enjoyed it too.
As you can imagine, it made a bit of a mess. But this little black-and-white-minded-one needs to be able to make a mess and understand that sometimes it's ok to be messy.
When we got bored, we poured it into a bag for another day. Easy to make, fun to do, pretty easy clean up. We'll definitely be doing it again.
Thank you, whoever you are, for the good idea.