Mrs Fox's Children's crafts and parties: Mrs Fox's Crafty Boxes
Roman Catapults, one my kids can make with almost no help
Castle and catapult craft
DIY Craft Stick Catapults -- 29 clever crafts for kids that adults will actually enjoy doing, too!
Use a CATAPULT to create a super fun and unique art experience for the kids!
These 12 catapult crafts are so fun your kids won't even realize they're learning physics when they make them!
Awesome STEM Activity for Kids--Make a Craft Stick Catapult using wooden craft sticks, paint and pom poms!
How to Make a Model Castle: 13 Steps - wikiHow
Genius! This simple marshmallow catapult can be made from common household supplies and is so easy to put together kids can do it on their own! Great science learning activity, and lots of fun.
Spy School Activities for Kids! Everything you need to host a spy themed summer camp at home! Great ideas for birthday parties too!