This portable work bench top might be child-sized, but it also looks to pack adult-level functionality.
Bench on a Bench More
BIKEfun Brompton Chain Tensioner
Suzuki Jimny Utility
wood frame bike
The Ruckus Cruiser from Coast Cycles.
If you can't decide whether a bike or a scooter is more appropriate to your type of riding … well, you might want to get a Moox Bike. It's a bicycle/scooter combo, with a little bit of fatbike thrown into the mix for good measure.