All about basketball

Mister Rogers enters carrying a basketball and goes back outside to shoot some baskets. He wonders about the height of the basket and gets a yardstick from his closet to measure the height of his basketball hoop. Later, Marilyn Barnett visits Mister Rogers and they exercise together. She explains specific exercises that she teaches to wheelchair athletes. Mister Rogers and Marilyn go to see some of her students, who are in wheelchairs, play basketball. In the Neighborhood of Make-Believe, Lady Aberlin is measuring while cousin Steve Owl bounces a basketball to test the sound of the ground. Lady Elaine Fairchilde and cousin Mary Owl are studying old maps in the museum map room, and cousin Mary found a piece of paper that mentions a secret tunnel.