Level 67
Stand three long beams on end, one on top of each blue box, and one one the ground slightly to the right. Line up the left-most one to hit an eyeball which rests on top of a green square. Use the other eyeball up top, make it roll to the right onto the conveyor belt.
Alternative solution
Yashar Kamyar also sent in this better solution:
Luisa also submitted an alternative way of completing the level:
