Ecology Boards
Change the world and the animals change. The six jobs do not.

Put a bird together from the bones out, and watch it fly away.
How it works
Three phases in order: the skeleton, then the organs, then the feathers. Nothing is timed and nothing can be got wrong; every piece goes where it belongs and tells you what it is on the way.
The bird is a ghost of itself and seventeen bones wait in the tray. Tap one and it flies to where it belongs and lands in color. You cannot put it in the wrong place.
Tap an organ and it lights up where it sits. Most of them are nothing like ours: air flows one way through a bird's lungs, there are no teeth, and the voice box is not in the throat.
Twenty-eight tracts of feathers across three drawings: the side, the back and one spread wing, because one view cannot show them all. The rows are the lesson.
The skeleton has to be finished before the organs will open, and the organs before the feathers. Finish all three and the bird flies away.
Change the world and the animals change. The six jobs do not.
A young owl learning to judge a distance, four times over.
A chick on its first flight, and a barn to get back to.