Although not Calvin's summertime weapon of choice (those would be the water balloons), the water gun or water pistol makes a few appearances throughout the strip. Whereas Calvin uses his dart gun mostly indoors, he will almost exclusively use the water gun outside. In one strip, Susie decided to play water pistol fighting along with Calvin and Hobbes. The result was that Hobbes (in his stuffed tiger form) allowed Susie to take a water balloon and use it on Calvin.
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