This is a good starter anime for kids IMO. The villians aren't too scary & the heroes are noble, funny & very likeable for a young viewer. With a giant smiling robot, ninjas & a boy leader, there something for any child to enjoy.
A warning should be noted as the lead villian keeps trying to kill himself with every failure however, his loyal minions keep him from the task humorously. As I saw this as an adult, I didn't care for it myself but, for family viewing, I think it would be great.