the scribble feature allows you to draw anything you want in 3d. it's useful because tinker cad has a lot of shapes but they are still not always enough for what you want to do. so getting the opportunity to draw what you would like it helpful. My weapon looks like a clover and has 3 different colored gems which gives superheros special powers and luck.Any superhero can use it to boost their powers. i have helped others and finished mine overall.