Sandra Bullock and her 2 1/2 year-old son, Louis, head to school Tuesday. The actress kept covered up - with a pair of sunglasses and a cap.
"Being a mom is her total focus now," a Bullock source tells People in this week's cover story. Along with her work, "Louis has become her whole life."
Read more about Sandra and Louis in People's new issue - out Friday.
Image:Splash News Online