In the not-too-distant future, we’ll be able to upgrade our bodies with real hardware. But what exactly do you want grafted onto your body? The world is your nanomachine-powered oyster!

Send your best entries to me at contests@gizmodo.com with Retro Gadgets in the subject line. Save your files as JPGs or GIFs, and use a FirstnameLastname.jpg naming convention using whatever name you want to be credited with. Send your work to me by next Tuesday morning, and I’ll pick three top winners and show off the rest of the best in our Gallery of Champions. Get to it!