Foldable kids Razor scooter (The Grange EH9)

Been in the cupboard for 10 years, but seems functional. Note that there used to be a quick release bolt at the top of the upright tube where the handle bars slot in. The handle bars do lock into place when extended, but the bolt would give extra security. I cannot find that bolt anymore. If you use it, you should be able to replace with any odd nut and bolt, or get a QR one from a bike shop.