A catapult with a button release. Take the arm of the catupult and bend it back until the tip clicks into the small hole. Put in the ball (or whatever else that fits) into the basket. Place right index finger on the hole and push in the bar with your thumb to release it. Have fun!
Disclaimer: Neither Shapeways nor I are responsible for any injury caused by this product. Do not shoot at faces.
3.972 w x
8.406 d x
1.564 w x
3.309 d x