I can't remember how old my lil man was but he's been doing it for ages. Maybe about 6 months, possibly younger. We used to get comments all the time about how well he did it at such a young age & I used to have women with 12 month & 18 month olds saying their kids still couldn't do it. He learnt to do it by lying flat on his back on the floor. These days he can sit almost upright in the stroller and do it & he's just turned 1.