OK, I'm looking for suggestions for my 4 year old daughter who loves her motorbikes. She's already got a Yamaha PW50 but is too young to be allowed on any mx track (6 seems to be the min) and if we take the bike to a car park or field we attract the attention (thanks to the vigilance of dog walkers) of the local constabulary within about 15 minutes. Met a dad/daughter combo who had an Oset electric bike and he said nobody ever bothers them. So it must be the noise of a 50cc 2 stroke that always brings the police running. I can't afford an Oset for her so I'm looking for a cheaper alternative to keep her happy until she at least looks 6. Anyone got any suggestions?