INSTRUCTABLES.COM: This site houses easy and challenging projects with step by step directions. Science, art and shop teachers will not want to miss this site. I made a cardboard dice tower, which lets you put in a dice on the top and then spit the dice out through the bottom. It works by hitting the dice with many platforms as it travels down the tower. To make this, I used cardboard, pliers, hot glue, paperclips, a pen, a ruler, and some paper.