miscommunication

This morning as I was getting ready to take one of our children to the doctor's office - I went into my room to change a diaper. After this happened I didn't see the child in question for 40+ minutes. I assumed he was napping or going to the bathroom, or something. When it was time to go I called for him to get ready. He didn't answer. I checked his room and the bathroom.. no child. He got on the school bus - I didn't even know he had gone outside!! Oops. After a quick call to the school I picked him up and got him there. Hoorah