Boys and girls ages 6 and up will love building this LEGO® NINJAGO® Nya vs. Mutation Monster Spinner (71849) battle toy and recreating scenes from season 4 of the NINJAGO Dragons Rising TV show. Once it’s built, kids push the launcher’s button to unleash the spinner toy into a quick spin and watch to see if the 2 elemental power parts fly off it when it hits its target.