Rube Goldberg Machine #2

Wow! I can't believe it's already number 2! Here it is:

So here is how it works:

1)The marble pushes away the stick so the steel ball can move.
2)The steel ball knocks the tower down, making the stick fall and letting the ping pong ball go.
3)The ping pong ball knocks down the block which, via connected string, pulls down a stick so the second ping pong ball rolls down into a tube.
4)The tube rolls down a ramp to the bottom and stops.
5)The ball rolls out of the tube onto one last ramp.
Mission Complete!

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!