The Smart Rope is easily one of the coolest pieces of fitness equipment on the market. Basically, it's embedded with tiny LED lights that display a mid-air jump count that looks like a full-blown hologram floating in the air. On top of that, it comes with a companion mobile app that tracks calories burned and fitness goals.
Normally they're over $100 a pop, but we've spotted them at a discounted $80 through Amazon. Snag one before they're gone–your leaner and meaner future self will thank you.