ThinkFun Fire Machine set (Catapult)

This is an easy to build catapulter expansion set.
You can also use your imagination to build your remixed version.
The new pieces allows you to move the catapulter arm up and to stretch the elastic rubber and to shot thanks to the trigger.
One thing that I didn't made is to create the lifter box with some cartoons.
I think that is better if you create your catapulter box by you own, in this way you will have fun and you will increase your imagination.
Obviously you can also combine the pri