The tenth book in the Learn with Alex and Anna series. Alex and Anna were playing in the garden and became mystified when a strange shadow, silently slid over them. Mummy and Daddy then enlighten them about light and shadows. Later, with Daddy's help, Alex and Anna learn about night and day. The following morning, Daddy puzzles Alex and Anna with an experiment about shadows. Alex then discovers that it doesn't hurt when someone stands on his shadow...