Initial puzzles

As a puzzle game, i have to think of interesting puzzles that I can realisticly achieve. I've been sketching some ideas. below are a couple of ideas I have.

One is a variation of the see-saw idea where the player puts an object into a tube and the tube takes it and drops it on the end of a see-saw, and if the player is standing on the other side, they will be boosted up.



The other is an idea to get the player touching things. a big panel of buttons that the player has to match up their length and once they are all aligned the door will open.