Hip seat. Convenient for the child when he has already started walking, but gets tired quickly. Take to the playground, go to the museum) The straps are unfastened with a zipper.
Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement.
No serious private advertisers ask for a down payment before you meet.
Receiving an email with an in-scanned ID does not mean that you have identified the sender. You do this on the spot, when you sign a purchase agreement.