When we were younger, pretty much the only thing that could end playtime was a lack of light — but that's not a problem anymore. Nerf Firevision ($10-$20) is a new lineup of gear that uses microprism technology to make things visible even at night. Whether you're playing football, basketball, or just bouncing a ball, all you need is a pair of Firevision glasses to see the action. The best part? No charging required.