Instructables user grandpapaning has built this pretty neat tap-dancing robot. In actuality, it serves no purpose whatsoever. In practice though, it’s a great way to teach people about the different areas of science – Electricity, electronics, mechanical design, turning electrical signals into physical forces. In general, lots of stuff. It’s all pretty neat really. There’s still time left in this Christmas vacation. Maybe you should look at building this useless thing.