Bigjigs Rail BJT152 Cars (Pack of 4) Children can use Bigjigs Rail Cars (Pack of 4) to motor through their wooden railway layouts, or load them onto freight cars Wooden cars are the perfect size to roll on Bigjigs wooden rail track, or on Bigjigs play mats (track and mats sold separately) Set of 4 cars, each measuring 2.4'' long, suitable for ages 3 and up Most wooden railway sets are compatible with Bigjigs Rail, making Bigjigs the perfect choice for starting or extending your collection Bigjigs Rail is suitable for children ages 3 and over, and conforms to ASTM and CPSIA safety standards