Wanna build your own supercomputer? All you need is some Legos and a few dozens Raspberry Pis. That’s Raspberry Pis — no “e.” If you can build a supercomputer with raspberry pies, do let us know. We mean those super-small Linux PCs cooked up by some brainy researchers in Britain. Yes, you’ll need some Legos too — and maybe some help from the closest six-year-old.