In his seventeenth month, Xander is: saying “bih boh” for “big boy”, “pepa” for “Petra”, “shack” for “snack”, “ton ton” for “crouton”, “caw caw” for “car car”, “shi” for “outside”, “tay too” for “thank you”, and “Jo Jo” for “Jonas”; doing the sign for “thank you” and “change”; getting pretty good at going down the stairs (just today he started doing the full body slide); champing out on his daytime and nighttime sleep; cutting four molars; echoing everything big brother does; delighting in rousing games of hide and seek with DaDa and Jonas; and brightening our days with his happy spirit.