One (of the few) benefit to living next door to a low-income rental duplex is that when the renters skip town or are evicted, the owner lets me pick through any of the junk they invariably leave behind. The last pair of characters left behind a set of little kid's 16" wheel bicycles. The were rough and neglected, but they are just the right size for my 4 yr. old daughter to start to learn on.
So I took them in. White plastic tires and tubes were dry rotted, lots of surface rust. All the bearings were dry and raspy. But I was able to cobble together one good bike from the pair. I'm out about $30 for new tubes and tires and about 5 hrs of rebuilding the wheels and getting off most of the rust with foil.
Chose the blue over the pink frame because my son will probably wind up learning on it too.
The Army aluminum field box behind it was also a bit of booted-out-renter-booty.