The Lego Ninjago live in their own world. The Lego Ninjago live in the shadows of this world, which is why they’re invisible to non-Ninjago members. Lego has been very successful with the Lego Ninjago, and it is very popular among boys between the ages of 7 and 12. Many different boxes have come out, including Lego Ninjago 2521 fight with the lightning dragon, Lego 9444 Ninjago Cole’s defense vehicle and the very popular Lego 9446 Ninjago destiny’s bounty.