LEGO Ninjago: Masters of Spinjitzu
This report covers the full series run (Seasons 1–15, 2011–2022). An action-packed cartoon following four ninja warriors who defend the world of Ninjago from a parade of villains, with plenty of martial-arts battles and humor woven throughout — but also a toy line very much front and center.
Most comfortable for kids 7 and up; confident 6-year-olds who enjoy action cartoons may be fine with earlier seasons, but the series grows noticeably darker and more emotionally intense in later seasons.
Episodes to know about
Season 1 introduces the main skeleton-warrior villains who fall apart comically in battle, and large guardian monsters protecting magical weapons; mildest scary content in the series.
Season 2 features the Stone Army and the Overlord, a large dark entity whose dragon form is among the most visually menacing villains in the early run.
Zane, one of the four main ninja, apparently sacrifices himself and is believed dead; this is treated as a genuine emotional loss for the team and may be upsetting for children attached to the character.