I went on the ferris wheel with my six year old daughter on Saturday. The guard rails on one side of the passenger compartment are far too low. They are also constructed like a ladder so a child could easily climb up them and fall out. This thing is 30 metres high!
There were small children riding the wheel with no adult supervision. Please don't let little kids go on the wheel on their own. Other than that it's very impressive and we had a good time.