With only 13 months between them Caleb and Mason are brothers who are just beginning to explore their relationship. Caleb is 2 and Mason is 1. Today Caleb was playing piano when Mason crawled over to join him. Mason doesn’t have the core strength or balance to sit on the bench to play so we pulled in his booster seat from the table and away they went. It was loud and not very much like music but to my mommy ears it was the sweet sound of brothers playing happily together.