This is a 5E lesson on using catapults. While it does have directions on how to construct catapults. The core of this is the lesson involved. Once you have built catapults, what do you do with them? This has suggestions for science, technology, engineering, art and math.
This was designed for a Home School/Independent Study weekly club. I met for an hour with students in K-2, 3/4, 5/6, and 7/8. The first week we spent an hour designing and building catapults. The second week we spent an hour completing the catapults and launching them with the corresponding graphing activity.