I still would like to know what a parent is doing (or not doing) for a baby to play independently for 3-4 hours straight….

I would also like to know how many times a day this baby is playing like this…?….2-3 times a day for 3-4 hours straight…?…..if not then what is the baby doing for the rest of his 10 hour day beside the time it takes to nap..eat…and change a diaper….?….