The five active items in this are the bird, the crate, the seesaw, the box, and the two shiny eggs. That red square is an object that is using the spring constraint since I wanted to try it out. It does NOT touch the box! It doesn't reach that far --- only the pig touches the box after being pushed by the spring.
My original storyboard ended up being different from the final because I wasn't able to implement the wheels or TNT...