Rosie dreams of becoming a great engineer when she grows up. She loves to invent gizmos and gadgets, including a hot dog machine and helium pants. She creates a snake repelling hat for her Uncle Fred.

Rosie is embarrassed, perplexed and dismayed when he laughs at her invention. From that moment, she keeps her creations a secret (under the bed), worried that they will be failures.

Her great-great-aunt Rose visits and mentions to Rosie that she still has one goal to achieve in her life. She wants to fly. Rosie lies awake that night, thinking of how she could help her aunt fly. She came up with the idea of making a cheese-copter.

After completing her invention, Rosie takes it out for a test flight. After flying for a few moments, it crashes to the ground. When aunt Rose sees the machine, she laughs. Rosie is devastated and then surprised when Rose hugs her. She tells Rosie about her test flight for a raging success because it flew. She reassures Rosie that failure is part of the process of inventing. “The only true failure can come if you quit.”