Scooters don't stand on their own, so they for sure needed a rack. Of course he didn't take any how-to pictures, so you'll just have to stare at these to see if you can figure it out. I think he added some blocking to the top of the pallet to support the sides of the scooters:
And then he also cut a section out of the front of the pallet so the front wheels can hang down into the pallet, letting the main part of the scooter sit flat:
We also have a couple of bikes that don't have kick-stands, so they have a spot on the rack as well. They are held up by their front tire resting in a groove made from blocking on the top of the pallet:
UPDATE - - Trevor just informed me that he did take how-to pictures - - so I guess I need to give him more credit - here ya go....