5 Year Old Reacts to Becoming a Big Brother Sharing is easy—and it helps more than you know. Facebook Pinterest Twitter Email Tumblr Reddit Flipboard Copy Link When this mother breaks the news to her 5 year old son that he’s going to be a big brother, his reaction is positively heart-warming. Sharing is easy—and it helps more than you know. Facebook Pinterest Twitter Email Tumblr Reddit Flipboard Copy Link