In chapter one it says that Iqbal would measure himself by looking out the window and every time he'd see a little more he'd know he's grown. He would get so excited and he wished he could tell his parents but every time he'd try telling someone they would ignore him because to them that wasn't important as much as it was to Iqbal. I would measure myself every week sometimes every month and I would make a mark on the side of my bedroom wall, I would share my excitement with my parents and they would get excited with me as well. I know for a fact that Iqbal would have wished to this as well.