A DIY baby mobile that could be made from some quilt batting (for the cloud) and colored paper or felt (for the raindrops). This Mobil could decorate the area over a changing table (a conversation starter for teacher and baby (Early Ed.
add wood wallpaper to the kick plates of the stairs. Those rolls are expensive but you would only need one. Not practical with white treads though, it will be stuffed up from black shoe soles in no time.
A serpentine bluestone path from the driveway and entering the rear yard and garden. Plantings with different heights, textures and colors create a wonderful experience and feel as you enter the property. (I like the straight pavers in a curvy path.