Shadow, Shadow, who are you?

For the past few nights, Caden has been amused by the shadows which has been casted onto the bedroom wall while we are trying to put him to sleep after his milk feed. Usually, we will switch off the lights and play his bedtime vcd music to make the environment conducive for him to fall asleep after his milk feed.. but lately, his high abundance of energy has led him to be actively climbing up to the headboard of the bed and retrieve the stuff which has been placed on the latch.. then he realised his shadow which was been reflected on the wall and thinking that its another moving object which is "playing" with him as he moves simultaneously, he got so hyped up and amused and pat onto the shadow showing his excitement.. I have also added on to his joy by casting a bunny shadow onto the wall moving towards him and he reacted by trying to pat onto this black patch of moving object as well.. when will he get to realise that its actually his own shadow that he's playing with??? Only time will tell...