When Nathaniel was fourteen months old, our then speech therapist asked if he was pointing at things. She expressed the importance of pointing and joint attention in language development and stressed that these were precursors for further language growth. She advised that I should place Nathaniel, who was still new at sitting up, in the middle of the room with everything desirable out of reach. "Unless Nathaniel points to the object, do not let him have it. No toys until he points to them."
Nathaniel was perfectly content to sit quietly for full days without toys.