Babies and toddlers are such appealing creatures (much of the time). Think of all the serious, critical work their brains are doing while they are drooling, grinning, babbling, and being so irresistible in the process. The mental development is systematic and intricate, but we get the delight of interfacing with this small, soft, round person who constantly rewards us by responding and growing as we in turn clap for them and vocally encourage. There is something especially po