exploding box

this was a prop for my school play. you have to have maybe 3 or 4 springs i got them from pens and hot glue them into the corners of the hole in the box. then glue the square platform onto the spings. there is a pin that you can use to hold down the plat form to keep it from expoldong early then just pull it out when ever you want. all the little extra pecies are ment to be loaded into it to shoot out. i sugest printing it at 150 scale