I was on another site when the subject of small portable air compressors came up. Well I splurged on a $20 12 Volt unit 300 psi maximum pressure from Harbor Freight and I'm pretty pleased with the unit for the money. I tried it out and it isn't the fastest at inflating your tires but if your down a couple psi in a tire or two it is sure nice to have. Also for you guys with kids that need to have a raft of other blow up toy to inflate it sure is better that using your lungs. It comes with adapters for these type of situations along with a pin for footballs, volleyballs and basketballs. Just passing the info it on to you guys. One of those things that are cheap and light weight to keep in the car for when you need it the most.
I understand these 12 volt compressors are also available at Auto part stores, Walmart, and probably Sears.