My kiddies love cardboard boxes
lol easy to come by and oh so cheap- we have built castles, cars, trains, or even just the big old brown box.
They also love anything musical. Drums, tambourines, maracas,
The wooden puzzles from Mellisa and Doug
And these dolls made for the Waldorf Schools... They look kind of strange and have no expressions (no mouth) so they can be whatever they want sad, happy, scared... They really use their own imagination with them