Here’s an easy way to get started. Have your students create a roller coaster out of nothing but construction paper, tape, glue and string. The objective: have a marble take the GREATEST amount of time to get from the top of the first hill to where the coaster ends.
T.J. Petronzio, a middle school science teacher with 13 years in the classroom, includes instructions, a rubric, and a video showing the results.
Hard to believe you can build something that big out (6′ high) of just construction paper.