From 12 to 24 months, your baby's mind will develop in amazing ways. By the end of his second year, he will be able to identify colors, follow simple instructions, and understand the rhythm of the day and his routines. He will know and appreciate the relationships he has with her family and caregivers — hugging and kissing you as a way to show love. Much of what he learns won't be what you teach him, but what he absorbs and thinks about in his own way.