The Teeter-Totter Caper is the fourteenth episode of Season 3 of The Brady Bunch, and the 63rd overall episode of the series. Written by Joel Kane and Jack Lloyd and directed by Russ Mayberry, it originally aired 31 December 1971 on ABC.
When they are not invited to Aunt Gertrude's wedding, Bobby and Cindy decide to show how "important" they are by setting a world's record for most hours on a seesaw.
Bobby and Cindy seem to be excluded from doing a lot of things because they are considered too small or too young, including going to Carol's cousin's wedding reception, to which even the older kids are invited. They decide they need to do something monumental to show everyone that they can do anything that bigger kids or grown-ups can do. Seeing a human interest piece on the television news about two college boys who are attempting it, Bobby and Cindy decide to try and break the world endurance record for teeter-tottering.
When they tell their family, no one really comprehends what they are trying to do until Alice finds out what the current is 124 hours. Mike and Carol allow the kids to continue despite realizing that there is no way they can break the record. They get newspaper coverage for their attempt, which ultimately fails when they fall asleep short of the record. The older siblings realize the attention-craving Bobby and Cindy indeed have their place in the family and are worthy of respect.