Here in Texas there have already been more than a few summer-like days with lots of heat and kids playing in sprinklers. Those hot days are perfect for some water gun wars. The problem with water guns like the Super Soaker is that you have to stop and refill the tank on occasion. NERF has a new Super Soaker that you can be reloaded on the fly with more water.
The gun is called the Thunderstorm, and it has cartridges that hold the water inside. The cartridges have plugs that prevent the water from leaking out as you run around. When you need a new mag, you pop the old one out and cram the new one in. No fuss is required.
It runs on four AA batteries for the motor. That means all you need to do is pull the trigger, and water will stream out. That means no pumping like is required on some water guns.The gun sells for about $22 (USD) over at Amazon, and additional magazines will set you back $6.