Minnie Mouse gives the instructions to make the Clubhouse appear exactly the way Mickey does at the beginning of each episode.
Pete's windmill has three levers--the green one to make it go and the red one to stop it. What was the blue lever for?
A baby alligator hatches from the egg.
Professor Von Drake recalls the time Goofy got turned into a baby in the season 2 episode, "Goofy Baby".
The shapes the six eggs were decorated with are a heart, a rectangle, stars, diamonds, circles, and triangles.
At one point, Leprechaun Pete brings out "Shamus", a leprechaun parody of Toodles, whose "mystery leprechaun tool" is a fog machine.
According to Professor Von Drake, Mickey's Comet passes over the Clubhouse every 10 years.
The mystery guest who took Minnie's muffins was a baby bear.
Mickey's opening speech before the opening theme song is slightly altered for this episode. He says that the magic words to summon the Clubhouse need to be said "exactly right" or else "something funny might happen."
Goof: When the keys fall off of the piano, they bear the numbers 8, 13 & 14. But when Mickey glues them back to the piano, 13 & 14 are already on the piano. The keys glued "back on" instead are 4 & 11.
In real life, it is impossible to make a hot air balloon go up into outer space. How could Mickey and Donald survive being in space without wearing space suits?