Some Stickman games that are appropriate for kids to play are "A Stick Mage Request," "Infiltrating the Airship" and "Stickman Downhill." These are all free to play and don't have major violence.
"A Stick Mage Request" is an adventure game where the player plays the character Stick Mage. They use sorcery to battle enemies.
In "Infiltrating the Airship," the player is a stickman trying to go on a failventure. He goes on an airplane that is currently being destroyed by acid. This is part of the "Henry Stickmin" series of Stickman games.
"Stickman Downhill" is a fun Stickman game where he goes downhill at a high speed. The spacebar is used to jump.