Timmy Twiddlebug is the son of Thomas and Tessie Twiddlebug. His sister is Tina Twiddlebug.

The Twiddlebug Family first appeared on Sesame Street in Season 5 (1973).

Timmy was first made as a Hot Pink Little Anything Muppet, but in most of his appearances, he was pumpkin orange

Usually, Richard Hunt used a typical little boy voice (often identical to voices he would use for female characters), which would be even more high-pitched when sped-up. On a few occasions, Hunt used a normal male-sounding voice, which would still sound high-pitched when sped-up.