My baby is growing up

Yesterday I had to take my baby to kindergarten registration, he will be turning 5 in early November which makes him eligible to go to school this fall. Now I'm having a hard time with this as he is my last baby. He is a self proclaimed genious and is so social active he really has to go to school this year. He is very excited to go and can't wait for his orientation day. What will I do without him around to lighten my day?