Baby Roen is attracted to the plastic bone Furgee the chug keeps picking up and chewing on. But Furgee appears to have something else in mind, like helping the baby figure out crawling. So the pup picks up the bone, chews a bit, then drops it, each time a little out of reach.
Furgee seems to understand that dropping it too far away would be counter productive. By dropping it just out of reach, the dog keeps the baby’s interest, and the baby keeps practicing crawling.