Barney gets a letter from his friend Professer Tinkerputt saying he's coming to the "Imagination Hangout" with a surprise.
During the visit he brings him various inventions like "The Rain To Candy Machine" "Professer TinkerPutts Portable Pastry Maker" and "The Sad Day to Happy Day Cheerer Uper"
Near the end Tinkerputt revals that his surprise is a music box that plays Barney's favorite song
- Professer Tinkerputt
- Barney Theme Song
- Being Together
- Professer Tinkerputt's song
- If All the Raindrops
- Rain , Rain Go Away
- If Your Happy and You Know it
- Muffin Man Medley
- I Love You
- This is TinkerPutts first apparnce since 1998
- Barney's Big Surprise is mentioned in this episode (Before the muffin man medley TinkerPutt asks Barney if he remebers when he made a similer invention during BJ's birthday party a while back)