Good idea, Bad idea

Good Idea: creating and marketing a small science project kit for young children to use and explore our universe. Including such gismos as a magnifying glass, ruler, string, paperclip, and the evil magnet.

Bad Idea: including the damn magnet. A small, 3 inch piece of iron that when dropped, turns into two 1.5 inch projectiles. 

Now these two projectiles, when thrown at an angle against a hard tile floor, skip back up in the air directly proportionate to the force used to throw them. And when these projectiles skip up in the air and impact a 45 X 75 inch sliding glass door, they punch a hole in it like a depleted uranium anti-tank round fired by the US army's Warthog aircraft. And when this hole is breeched, the amazing scientific properties of tempered glass are shown to full force. A literal implosion of glass. Every square inch of the 45 X 75 inch surface now had at least 16 individual pieces. Multiply that out and you are looking at 16 Billion pieces (if my math is right). 

Now I don't believe that this particular project was in the instruction manual, but it is written loosely and gives you room to create your own projects.