Challenge Nitro Predator, Star Striker, Bone Cruncher and Crazy Demon at LEGOLAND® Discovery Center Boston in our LEGO® Racers: Build & Test. Let your imagination take over as you build your vehicle and take it to the ramps. Test your car and see how you can make it go faster! Once you have built your race car, time its speed on our test track. With times recorded to the hundredth of a second, it might be a close competition between you and your friends!