It's Pluto's birthday party, but Mickey's dozen or so nephews seem to be having all the fun. Their present is a wagon so Pluto can pull them; the "Pin the Tail on Pluto" game doesn't go quite right, and everything seems to prevent Pluto from having his birthday cake. But Mickey has planned ahead.
Sound
Pinto Colvig's Pluto whimpers are pure heartbreak
Editing
Seven minutes of escalating chaos, zero fat
Director
Milt Schaffer
Trivia, insights & behind the scenes
This was one of James MacDonald's first performances as Mickey, replacing Walt Disney himself. You can hear the shift—slightly less Midwestern sass, more perpetual worry.
The 'orphan nephews' trope here reflects 1950s animation's love for chaotic child mobs with zero supervision—see also Donald's nephews, who technically ARE his nephews, unlike whatever THESE kids are.