I doubt that u cam make a 22 month old "understand". I would set up a desensitization procedure where the teacher holds your 22 month old and sits by the older child. Verbally reinforce both children.
This article on MSNBC.com is pretty enlightening. (Click post title above to read). When I read the part about PMS and cravings it made total sense. I know a bit about serotonin, and the fact that the amount of it is lower i
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