Mr. Moose

One was set at the Oshkosh Air Show, where fellow puppet Bunny Rabbit climbed into a yellow aircraft without permission.

Captain Kangaroo climbed in to retrieve him, only to have Bunny Rabbit crank the engine and begin a takeoff roll.

The camera changed point of view to a green hilltop, over which sprang a red tri-plane, flown not by Baron Richthofen but instead by Mr. Moose.

In short order, he met Squire Greenjeans and the mysterious Monsieur Moose who dropped hay on people because ping pong balls hadn't been invented yet.

In the animated television series Family Guy episode "Hell Comes to Quahog", after Joe sends a ping pong ball out a window, Peter persuades Mr. Moose to say "Knock, knock", then answers "Ping pong balls!

Mr. Moose and the Captain's Jacket at the Smithsonian Institution
Allan Jones, a collector from Cleveland, Tennessee, owns the Mr. Moose puppet and is credited with having the most extensive collection of Captain Kangaroo memorabilia in the world.