Little Ninja fans ages 4+ can recreate action from the NINJAGO Dragons Rising TV series as they learn to build with Kai and Ras’s Car and Bike Battle (71789) playset Kai’s dragon race car measures over 2.5 in. (6 cm) high, 8.5 in. (22 cm) long and 2.5 in. (6 cm) wide so kids can take it to their friends’ houses for playtime The LEGO Builder app guides kids on an intuitive building adventure. They can save sets, track their progress and zoom in and rotate models in 3D while they build