Designing your baby's nursery begins with choosing a theme and color palette. Surround him with images that will spark his imagination and promote curiosity. Make sure it's a space that will be equally comfortable for you and your baby, because you'll spend a lot of time there together. Your second trimester is the perfect time to gather inspirational images and begin planning. Think in terms of softness and simplicity – especially in your baby's earliest months, comfort and convenience are key.