We started doing tummy time with Kai per the doctors instructions... I never remember being instructed to start tummy time this early with Mila but I figured it doesn't hurt to start early. The other day I put Kai down with an art card and the boppy to get a little practice with tummy time and Mila wanted to do the same. I snapped a few photos of her laying next to Kai. She looks giant compared to him.