Some non-violent ninja games that are free to play online include "Ninja Rope Jump" and "Pizza Like a Turtle Do." The games do not require battling with swords or employing dangerous ninja moves.
"Nina Rope Jump" is a non-violent kid-friendly ninja game where the player helps a ninja jump as high as he can. A player does this by using the mouse to help the ninja climb up a cliff with a rope. Players collect stars as they move higher up the mountain.
"Pizza Like a Turtle Do" features the Teenage Mutant Ninja Turtles. Instead of fighting their enemies, the Turtles work in a pizza restaurant, building the pizzas their customers order.