The main issues here are that children cant control the cars well enough (you need to half pull the trigger which our 5 and 6 year old couldnt master, so the cars are forever flying off the curved track. Literally within 2 minutes of them playing with it on the 6 year olds birthday, the buzz character snapped off his car, and the metal wool-type conductors on the bottom of both cars were bent meaning neither would go back ojn the track, rendering it useless.
It is really not suitable for children below 8 years old in my opinion, by which time they would probably prefer a normal scalextric set.
If your kids are below 8 i would strongly recommend not purchasing this.
Have to say, Amazon's returns policy is outsanding customer service however. They call you, email you, and send you a link to arrange free DHL of the goods back to Amazon. Outstanding.