Walk, car, a hundred and one varieties of bike(s). But two new (to me at least) ones:
Take one of those shopping baskets on wheels with a long handle - the sort that used to be the preserve of grannies in the high street but now seems to be fashionable among every one (well, every woman at least) and not just shopping. Replace the bag with a sturdy yellow plastic basket. Put small child (about 6 or 7 at a guess) inside. Cover with coat. A cushion may be added for the child's comfort.
If you are a postman and you have somehow acquired ("I thought they didn't use these anymore?" "I don't think they know I've got it.") one of those Royal Mail bikes with a flat tray at the front for letters, balance child on tray, then make like a meerkat!
Any more?