For many people, 3D printing is just a diversion, not a world-changing technology. Are those people wrong? Of course! The latest piece of truly civilization-altering 3D wizardry to make waves is an exoskeleton for disabled children made from the same plastic as Lego.

The exoskeleton, called WREX, helps smaller kids to gain mobility, and can be printed to the exact specifications of each child. WREX has been around for a while, but until now the skeleton had to be made of metal. Thanks to the miracle of 3D printing, it’s now possible to make lightweight versions of WREX, and what’s more, they cost a fraction of the amount.

This is just the latest in a long line of stories that really show the potential of 3D printing. Just imagine how much good a 3D printer could do in developing countries where disabled kids lack access to expensive medical prostheses.

What’s more, thanks to the fact that anyone can create a design to be printed, the future of invention looks bright. Garden shed inventors could very well be the source of the next medical technology breakthrough. So if you’ve got a 3D printer, why not think about what problems you could solve?