Rogers shows models of a bicycle and tricycle. Along the way, he introduces the prefixes ""bi"" and ""tri."" In the Neighborhood of Make-Believe, Bob Dog fears moving wheels.
| Name | Type | Role | |
|---|---|---|---|
| Fred Rogers | Writer | ||
| Donald Davison | Guest Star | ||
| Jay Wik | Guest Star | ||
| David Fu-Ying Chen | Director |