Aren't these sets adorable! Target has come out with a new home décor collection for kids called Pillowfort. Choose between Camp Kiddo, Ocean Oasis, Stellar Station, and not pictured, Creature Cave, Floral Field, Modern Mirage, Tropical Treehouse, Marvelous Manor, Grand Getaway, Discovery Den, Sprinkle Suite, and Explorer's Escape.
Remember, just because it's marketed to children doesn't mean adults can't get in on the fun. You can add some of these whimsical items to your décor. I spy several fun things to use in a big kid's room like the Oar Plaque, Anchor Plaque, Ship's String Art, and lamp in Ocean Oasis. The Forest Plush Blanket and Hello Wall Plaque in Camp Kiddo. And the Cage Pendant Light, Wood Milk Crate, and Ceiling Light to name a few.
Read Decorating Children's Rooms for more ideas.