Seesaw Bridges is the 29th stage of Advanced Mode in Super Monkey Ball 2 (68th in Super Monkey Ball Deluxe), the 128th stage of Ultimate Mode in Super Monkey Ball Deluxe without continues (108th with continues), and World 4-9 of Story Mode in Super Monkey Ball 2 (World 4-15 in Super Monkey Ball Deluxe).
This stage features three seesaws. The first seesaw contains three logs/canisters evenly spaced out across it. The second seesaw features a gap 2/5 of the way along it on the left side and another gap 4/5 of the way along on the right side. The third and final seesaw features three sets of logs evenly spaced out along it with the first and last sets having three logs and the middle set having five canisters in Story Mode, or 4 logs in Challenge Mode, making the Challenge Mode version slightly easier.
To get to the goal, rush through all of the seesaw bridges. In order to get to the goal, you need enough speed when playing this stage. Because if you're too slow, then the bridge will tilt too much, which will make you fall off the stage. Alternate along the logs, especially on the last seesaw. On the second seesaw, make sure to start on the left side, so it will be tilted much more to that side once you are shifting to the right of the gap.