Trunki Harley the Ladybug Ride-on Suitcase (Limited Edition) £26.24 delivered @ Amazon
These aren't cheap - but if you've ever had one - you'll now they are great value.
Still £35 at John Lewis
Trunki Harley the LadyBug is a ride-on suitcase for globetrotting tots. Its the new limited edition to the Trunki range for Summer 2009, which is made to the same high standard as the other Trunki favourites but with two carry handles. Fitted with the same specification as Terrance, Trixie, Towgo and Tipu, it has a soft rubber rim, ID label, carry handles, teddy bear seatbelts, its own passport, locking catches, secret compartments and an internal pouch. Trunki's lightweight and durable design is hand luggage approved, with generous space inside for toys, games, books and spare clothes. Trunki is the ultimate travelling companion. Children can pack, sit-on and ride their own luggage whilst parents can keep them in tow. Just in case your little one gets tired, Trunki has a handy shoulder strap and new grab handle so that parents can carry them with ease. Designed by a British company, Trunki is taking the world of travelling with tots by stormthe further they travel the more popular Trunki's become!
Also pink @ £28.75 - http://www.amazon.co.uk/Trunki-Trixie-Ride-Suitcase-Pink/dp/B001A29DPA/ref=sr_1_2?ie=UTF8&s=baby&qid=1254990264&sr=1-2