With “The Lego Ninjago Movie,” the third in the series, the novelty is gone. We’re now familiar with seeing plastic cube characters animated in all their awkward but effective glory.

Not that your average “Ninjago” fan (average age 6-8) would care about whether or not ninjas are in vogue. Since launching simultaneously as a show and product 13 years ago, the Lego ...

Not that your average “Ninjago” fan (average age 6-8) would care about whether or not ninjas are in vogue. Since launching simultaneously as a show and product 13 years ago, the Lego-originated ... on ...