My son (aged 4) likes to ride his scooter to school, then I carry it home. It's a brand new fairly expensive scooter, his main Xmas present this year. On Tuesday morning, I left it outside the class room while I helped him sort all his stuff out, which admittedly takes a while. When I left, it had gone & as yet no trace. This is a secure area for 4/5 year olds....I'm shocked, school have barely blinked! What to do now???