Another one of my favorite places at the Kips Bay Showhouse was a simple corridor leading to the children's bedroom by Andrew Tedesco Studios. It's simple, graphic, and colorful.
Here's how you can incorporate some of these ideas into your own space.
Lucite Light Switch cover - Forbes & Lomax
Chalkboard Paint - Hudson Paint. Benjamin Moore has some chalkboard paint as well or you can make your own if you wish.
Wall Paint - Mythic Paint in Orange Nasturtium
Door Handle - Omnia Industries
Stencil - Anemone Grande from Cutting Edge Stencils, paint your own or use a wall sticker.