Curious George gets into trouble when he boards a dump truck and spills a load of sand in the road but redeems himself when the sand blocks the getaway of jewelry thieves.
Separated from the man in the yellow hat while at a Christmas tree farm, Curious George ends up at a hospital where he delights the child patients with his own brand of tree trimming.
When George and the man in the yellow hat visit the aquarium, George's curiosity gets the better of him and he accidentally joins some of the exhibits.