Hi there, I usually just use the same pump I use for blowing up balloons. You can get it at pretty much any party store or online via Qoo10.sg. Doesn't cost too much -- I got mine from a party store in Arab street for about 5SGD. Here's a link for a Qoo10 posting that seems to be selling it for $3. http://list.qoo10.sg/item/PRICE-ADJUSTED-DAILY-AIR-PUMP-INFLATABLE-FLOAT-TOY-AIR-FOOT/411017450