Final product:

1. Ball dropped into bottle
2. Rolls down track into foam cup
3. Causes teeters -totter to raise and launch 2nd ball into scoring cup
4. The falling foam cup struck a stick putting the 3rd ball into motion
5. 3rd ball rolls down track sticking and knocking out pin holding back rubber band
6. Rubber band launches 4th ball onto pan of mousetrap
7. Bail of mousetrap pulls strings tight to pull weighted cup onto buzzer
8. Mission Possible!