This toy is NOT compatible with the regular wooden Thomas Train Set. Toys R Us should have this information listed in the description above. Also, if you order this through Amazon.com, be careful in returning this item. You cannot physically return Thomas Train toys to a Toys R Us store, even though you may have logged into toysrus.com. Apparently, the toys are under Imaginarium.com, and toys purchased through Imaginarium.com can only be returned through shipping them back. Finally, the shipping charges are more expensive when returning a toy, than when you initially purchase it online.