Do you do sensory bins?
I really like the idea of them and David has had a lot of fun playing in them when I've done them but we haven't yet quite figured out the mess factor.
I don't know if he's not quite old enough or I haven't explained boundaries well enough or if it's as mess free as it's gonna get.
p.s. I can take no credit for the pretty colored rice. My mom made it and it was leftover from a project she did at the Valentine's Party.