My Big Big Friend is Canadian/Brazilian children's series made by Andrés Lieban and Claudian Koogan Breitman. It centers around three children, each of which has a "Big Big Friend", large animals only they can see.
No Kid Is An Island (EP08)
Golias was told by his friends to drink water from the ocean. He starts drinking and begans to swell up until he stops. He struggles to contain the water and lets it out since he can't hold it.