Here are my favorite sources of information and inspiration...
Theories of Development: Concepts and Applications (Crain, Thomas)
What's Going on in There? How the Brain and Mind Develop in the First Five Years of Life (Eliot, Lise)
Einstein Never Used Flash Cards (Hirsh-Pasek, Kathy and Golinkoff, Roberta)
Other Stuff- I love that there is a blog for every topic imaginable!
Science A Go-Go
Forward Day By Day
Dirtiest Kid in the World!
Happy Fit Mama!
You Can Find Me Here!