Bigjigs Rail BJT415 Bulldozer Low Loader Bigjigs Rail Bulldozer Low Loader adds creative possibilities to your child's wooden railway system Load the small wooden bulldozer onto the Low Loader, and transport it by rail to the construction site Magnetic couplings help link it to other engines, wagons and carriages in the Bigjigs collection 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