Rube Goldberg Machine #1

Hi everybody! Here is my very first Rube Goldberg Machine!:

So here is what happens:

1)The first book is pushed, and all the books and CD containers fall in a chain reaction.
2)The last CD container pulls down the block via tape, allowing the marble to roll down the ramp.
3)The marble pushes away the stick so the steel ball is free to roll.
4)The steel ball knocks down the stick-supporting blocks, so the stick falls and the ping pong ball takes it's turn rolling down a ramp.
5)The ping pong ball shoots away the stick that holds another ping pong ball from going down.
6)The second ping pong ball makes it's way down the final ramp and stops in front of the big block. Mission Complete!