Design Challenge: Catapults

As an alternative to the typical arts and crafts programs we often see in libraries, I decided to do a little something different by creating a "Design Challenge" for the kids.  As opposed to simply creating something, the kids are challenged to build a structure using engineering skills and applied science concepts.

This week I decided to have the kids build catapults. I introduced the idea of catapults used for battle during the Trojan War of Greek Mythology, telling a short story about the Trojan War as background.  I like to tie the design challenge back to some literary elements whenever possible.  This also gave me the opportunity to offer books on Greek Mythology available for checkout at the conclusion of the program.

While I do offer a "model" structure for the kids to look at to base their own structure design on, I encourage them to experiment with different elements of the design to see if it makes a difference in its functionality.  For example, by offering the questions, "I wonder how we could make the catapult shoot farther?" or "What would happen if the catapult's base was wider?" or "Does the amount of rubber bands I use make a difference?", kids are prompted and encouraged to explore different design techniques and each child ends up with a unique and individual product.

Once the kids have built their catapults, it is time for battle!  I provided little colored pom-poms for them to load and launch from their catapults.  They can try to achieve different goals such as going the longest distance, shooting the highest, or hitting a specific target.  The possibilities are endless in this Design Challenge program!