I always find it fun and curious trying to figure out where my littles pick up expressions that we don't use at home.
You do realize, of course, that this means your older dc may very well "good job" your younger dc

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Personally, I don't get worked up about praise. I don't give empty praise, only genuine praise. But I give genuine praise liberally! It feels good to me and my children. Maybe it feels right to your dd?
Also, my second toddler is being raised in a much less controlled environment, simply because there is an older sibling in the house (sugar/candy earlier, tv exposure earlier, less ideal modeling, etc). Honestly, he is better adjusted than my first toddler, so I've come to question a lot of the theories I held with my first
