What are some cool things to buy off Amazon.com?

I save a little money per week for a couple months and then try and buy something. I find it fun just hunting for something cool to buy. I can't afford real expensive. Try and keep it under 250. It can be anything fun, clever, whatever. Does not need to be extremely awesome, but if so, that'd be great. For example I have bought a cotton candy maker, a humidifier (lol), q great laptop cooling fan, a dog-bite sleeve for protection training because I found a rottie pup at the river, etc. None of the things I have bought are really that cool obviously (Cotton-Candy maker was pretty kick *** though lol). Any cool category or specific items to check into would be greatly appreciated. Thank you