We really don't need to write anything here, because we both know it's way too hot for you to be sitting around reading product descriptions.
Step one: Buy this water spray fan.
Step two: Receive this water spray fan.
Step three: Spritz yourself with water, while the cooling fan helps keep it cool on your skin.
Step four: Go chase down the ice cream van :)
Requires 2 x AA batteries
Colours may vary