NBN —The worldwide bestseller and multiple award winning—The Wonder Weeks. How to stimulate your baby's mental development and help him turn his 10 predictable, great, fussy phases into magical leaps forward describes the incredible mental developmental changes (leaps) and regression periods that all babies go through. Understanding the real reason behind crying, eating and sleeping problems is the only real solution every parent needs. The Wonder Weeks reveals what's going on inside baby's mind. Including a bonus chapter with everything about the relationship between sleep and leaps, as well as unique insight into your baby's sleeping behavior.