The one with water and switch on the right. There is a box on the left, pull it over (there is a horizontal bar on the stairs, pull that away, and the box will be under the opening after the horizontal bar is pulled away), then turn on the switch, run up and wait for the water to be full, stand on the box, and after floating up, there is a ladder to catch. When you catch a box on the right side of the ladder, you will pull it up, and the same square farad will come out. The water is full, just step on it and jump. Then go to the place where there is a balloon below and pull open the horizontal bar on the balloon. After the balloon bounces off the horizontal bar, quickly push the horizontal bar backward to prevent the balloon from falling, then push the balloon to the right slope (if there is a slope ball, it will roll down by itself, which will save time), then run to the ladder on the left and climb it, and then step on the rightmost wooden box. The balloon will float up, get stuck in the box, and then float through with the water.