Meet the Aeyo scooter: a fun two-wheeler that makes its riders feel like they are skating. It has two strap-on skates connected to the front wheel. The design is stable, so riders can keep their balance as they use their legs to move forward (unlike a regular scooter, you will need to use both legs). The Aeyo does fold up and has a fairly compact design. You also get standard features such as hand-brakes.
The Aeyo makes moving about outdoors more fun. It is up for grabs for 449 euros. I prefer trikes like Sway much better but this does have potential.