I would also have liked as a kid!

It's great that there is this beautiful and very easy to handle (for 2 1/2 years) locks. And great that there are 2 different car colors and matching different key -so there is no confusion (and in two children no quarrels: o)
The length is sufficient to attach the wheel to a "normal" bar.
Practically, the included bag for the lock and the key. The bag can be fastened with the attached to the bag velcro straps at the wheel - so you have everything well accommodated while driving and need the locks not to store anywhere else (I think that's really convenient; however, my children do not like that (why have they do not yet declared; o) - so the bags are in the bike basket)..
Conclusion: Who needs castles for younger children who have not yet come to terms with a "normal" Castle: these are highly recommended!