What do you do when the 20 month old has learned the word "mine", and everything the 6 year old has, the little one wants? At first, I took everything away from the baby, saying, "No, this is your brother's toy. Here this is YOUR toy". Now, the 6-year old is getting upset if the baby plays with a brush or comb or some old, broken toy that hasn't been played with for months. Please tell me this stage won't last too long. I never thought I'd do it, but I'm beginning to buy 2 of everything.