Have lots of cardboard scraps around?
Just cut them up into odd shapes and sizes, punch some holes around the edges and find some craft twine/ shoelaces / nylon threading stuff. You may wanna get kiddo to paint or stick colour paper onto the cardboard pieces for the fun of it before getting him/her to thread through the holes.
It’s open-ended play so let their (and most importantly yours) imagination run loose. Kiddo actually calls this a parrot and ‘walks’ it (pulling it along the floor will be a more appropriate description) like a puppy.