At this size, what you need is a lightweight bike made with an aluminum frame, all the fun and no fuss : the all-terrain 16" tires roll smooth, the simple single-speed keeps it durable. Ready to go blast around the local neighborhood.
The pull-out hose puts less stress on the valve. And you weren't stressed to start with. It's all very well hauling a giant pump around, but all that leverage can snap a delicate valve stem right off.