My wife Krista told me a great story from her trip to Costco yesterday with our two sons, Ford (age 3 ½ ) and Teddy (age 2). Krista bought yogurt for each of the boys. Our younger son Teddy quickly finished his yogurt and immediately began to cry for more. Ford responded by feeding his own yogurt to Teddy, spoonful by spoonful. He did that without any prompting from Mom.