RobotpowerE7

Yesterday when my son (he's nine) was creating in Mine-imator, he couldn't animate as usual as the red, yellow and blue lines and circles used for rotation and bend disappear from the animation. When he clicked an arm or leg, they wouldn't reappear. Does anyone know how to fix this? I tried searching for answers but didn't find anything. Can anyone help this already stressed out mom with a solution? Thanks in advance!