Laser tag is nice and all, but the weather is supposed to be beautiful this weekend—at least where we are—and we're trying to get you people outside, away from the computer! SUCK UK has a sweet idea, a way to play with water guns that lets you know when the other player has scored a kill.

The concept is simple, yet genius. Each player wears a special vest that turns red when hit with water, and you get two water guns to play with. Shoot each other, and no more arguing over who hit whom! Sadly, the set is not actually available yet, but there are ways to rig up something similar yourself.

Take a tablet of Alka-Seltzer and, very carefully, drill a hole through the center. Thread a string through the hole, and then affix this to someone's clothing. Grab a few water guns of any make and model, and you have yourself a way to play foam tag that won't ruin clothes and will, again, allow you to fairly count kills each round.

For more fun? Put the tablets on your arms and legs, and if you get hit in one and it starts foaming, no more use of that limb. This idea came from a great book, by the way: Geek Dad: Awesomely Geeky Projects and Activities for Dads and Kids to Share. No, this is not an ad, but a friend gave me this book for my birthday, and our ongoing series of "get your butt outside" posts tend to get love, so I wanted to give it a shout out.

This is fun you can have with your kids, with your coworkers, with your spouse, and your friends. Just get outside and take part in some water warfare.