My three boys are always practising transitions, running mounts and flying dismounts. I started to build them a classic, scaffold tubing bike-rack structure.
"No. No. No. Stop Dad! We want a proper WTS transition area!"
We found some photos online and then I got a closer look when I was in Rotterdam. Elliot and Etienne helped with measuring, painting and screwing.
They carry them out into the street and also use them to store their bikes in the garage.