Got one of these for DD for Christmas (chanced upon it in a big sports shop and she was riding it round and round the shop!) and she LOVES it. Is low slung so she feels really confident and can put her feet down to stop herself (never really got the hang of brakes anyway). Just thought I would post here in case it might help someone else.
http://www.amazon.co.uk/Razor-Rip-Rider-Caster-Trike/dp/B002KHMG9O/ref=sr_1_1?ie=UTF8&qid=1294127049&sr=1-1 Rip Rider 360