It's time to be creative with the materials you have at home.
Build a Castle
Rocket1
Rocket 2
Popsicle stick BirdFeeder
Rubberband car
Tinkertoy structure
Soda can car
Lego birdfeeder
Robot
Flying Bird Toy
Animated Bunny
milk carton birdfeeder
Rubberband Racer
Monster Automation
Ball Maze
Water Wall
Simple Rube Goldberg machine
Pop a Balloon
Don't Break the Bank
short rube goldberg machine