I've been adding more free 3D printables over on my MakerWorld account.
You don't have to have an account to download files, but if you do have an account, you can save designs to specific categories (a tip from me though, if you're really interested in something, download the files because they may be removed in the future for a variety of reasons).
Anyways, I'm most happy with my Tic-Tac-Totoro set since I feel, while not super complicated, is a decent achievement. All of the colors print separately, so if you only have a single color printer, you can print it "in color". Totoro works as a container for the soot sprite and acorn play pieces and the tummy lid flips to reveal the play grid.
The other designs rely on a multi-color printer setup though to print as shown, but you could always print them in a single color and paint them!
