The Hudora Joey balance bike as used by the first wingpiglet at PoP 2014 (see chdot's photo in the right-hand sidebar) could be yours...
12" pneumatic wheels, new tyres fitted during the most recent user's usership. Seat adjustable from 38cm/15" to 46cm/18" - age approx 2¾ upwards.
Light enough to strap to the handlebars or a rucksack for transporting with the child in a rear seat over longer distances. Cosmetic wear and tear - non-functional rear mudflap no longer present. Bearings still spin freely.
£30? Free delivery roughly within A720, or collect from Leith.