Recycle Center

In my school, we've made a Recycle Center using Legos. It was very cool, we finished it in about three hours and a half. After we finished, we presented it to the third and fourth grades. It's part of the project "O Rio dos Sinos é Nosso". It's a project to save the Rio dos Sinos, a river of the city that I live.

Comunicação:
Washer -> Garbage Truck: Ultrasonic Sensor
Garbage Truck -> Selector Mat: Hand
Selector Mat -> Compactor: Bluetooth
Selector Mat -> Bulldozer: Hand

In some days this project will appear at the local newspaper!

P.S. My brothers destroyed my secret truck :(

EDIT: They deleted the photos from my school site!