"Grover Takes a Walk" is a skit in which Grover asks the listener at home to lie down on the floor and imagine that Grover is very small. Then he takes a walk all over the listener's body.
He starts at the toes, walks up the leg, stops at the knee, and then walks up to the listener's tummy, but he trips over the belly button. Then he asks the listener to pick him up and put him on the forehead. Grover then walks down between the eyes, and onto the nose, but then he falls into the listener's mouth. Then he asks the listener to blow very hard, and Grover shoots out of the mouth, and onto the floor.
Grover thanks the listener for being a nice person, and a nice place to visit.