"In nearly 40 years and hundreds of sets, I've never had an issue with a LEGO product - until now. Such a shame. This was a Christmas present for my 2yo daughter. All was good for about a fortnight - then the speaker in the hub (the unit that drives the train and responds to the action bricks) failed. Now, when the train rolls over the action bricks - silence - which detracts from the play experience. Others have reported the same problem. I've requested a new hub from LEGO Customer Service and hope to hear from them soon. This is still a great set; I'm just disappointed that my trouble-free experience with LEGO has ended."