For example, today we built catapults using 12 popsicle sticks, 1 spoon, 1 rubber band, tape, and a paper clip. The students shot pennies, nickles, and quarters to see which one was more accurate. My students loved it, and had a great time.
Over the past few weeks we looked building bridges with toothpicks, skyscrapers with construction paper and newspaper, and boats out of newspaper, and Styrofoam plates. There are still a few more to do.
This is such a fun unit. I love hearing my students ask me "what are we going to do next?" I just keep telling them that they will just have to come back next week to find out.