I remember hearing about the complexity of praise back when my children were toddlers. Rather than say, “that’s great, that’s so pretty, that’s the best thing in the world” when given a drawing by your child, you could instead say something less praise-like but more specific to what they’ve given you like, “look at that big tree you drew!”
After all, we’re not looking for pretty drawings from them or to have them draw to please us, we just want them to keep drawing (or whatever the activity is).