Slappy and the Stinkers

The name of this movie is Slappy and the Stinkers released in 1998-01-23 and it's main theme is Five 2nd-grade kids who don't follow strict rules by their school principal Brinway are dubbed Stinkers by him. On the class visit to an aquarium the Stinkers decide that a sea lion called Slappy doesn't feel too good there, free him, and plant him into Brinway's hot-tub..