Bikes, bikes, bikes. My long time favorite has been a simple steel mountain bike called the "Monocog," of which I now own two.
hello simple, less time wrenching and more time pedaling
it comes stock with two wheels, one gear, and child like joy
My new favorite bike is our cargo bike. Today we hauled all the baby stuff to a play date. I have to admit this is the coolest bike I've ever ridden. Like all good bikes it carries people and cargo efficiently and elegantly.
The stroller doubles as a roof!