This is not an in-depth look at all of the research on the brain (such a resource would fill stacks of books). Instead, the goal of this brain tour is to familiarize you with major brain structures and their functions. The cerebral cortex is the part of the brain that functions to make human beings unique.
Advice. As your child gets older, advice for the next year can be good to write in his birthday card. Don't give him a lecture, but rather something that is positive, encouraging or inspiring.
Poems. Even if you aren't a poet, you can still write a simple poem in your child's birthday card. It doesn't have to be perfect. You can be as silly and clever as you want, and it doesn't even need to make a ton of sense. Even a short, simple poem about her can be memorable.