The full title is Lil' Einstein's Manhattan Project, and it takes you to his garage where you will be a test subject in his brilliantly crafted science project. The object is to upgrade your plane with new weapons and bombs in order to purchase the Atom Bomb by day 25. In order to buy the A-Bomb, you must buy all 9 other bombs which are successively stronger than the last.
Walkthrough
The walkthroughs below show you how to get the Teacher's Pet medal the best way. You can't totally rely on this walkthrough because of the moving cars that do not spawn the same way every time. In the description of the videos you'll find some more tips on getting the medal. Part 1Part 2