Keep it simple. Put out some play dough + a few duplo animals... and set up a suggestion to make 👣 footprints. You can talk about: what a footprint is, who has which footprint, compare the shapes and legs- are they wide/narrow, person or animal? Why do animals make 4 prints and people make 2? So many ways to extend the conversation and keep the play going. If that's not interesting, why not feed the animals! Make some play dough food.