Here are some creative ideas for decorating a sports themed bedroom or playroom: 

• Put a basketball laundry hoop on the back of the door. 
• Hang framed sports posters on the walls. 
• Display trophys or sports knick knacks on wooden shelving. 
• Put tall mesh baskets filled with sport balls, such as, basketballs, soccer balls, etc.. 
• Hang favorite team pennents
• Use a sports organizer bench for more storage.

We found the above sports themed bedding and accesories at Land of Nod.

Other sports room related shopping:

• FamilyBedding.com Sports Themed Bedrooms
• ESPN Fan Shop
• Footlocker

• Use stained knotty wainescoting for an authentic look...
• Purchase knotty log furniture.
• Hang cowboy hats on the walls.
• Use denim and red bandana pillows for accent.
• Tie a bandana around a teddy bear's neck to make him look western too!
• Use an old pair of cowboy boots for decoration.
• Use horseshoes as accent on walls
• Use gingham sheets and drapes.
• Display horse miniatures on wood shelves for decoration.
• Display your Lincoln Log House proudly on a dresser.
• Change a plain denim lampshade into Wild West theme by adhering (with hot glue gun) twine, leather roping, or other embellishments.

We found these western-themed decorating items at Land of Nod.

• Construct a real train track to go around the perimeter of the room, as seen on HGTV.  Every little engineer's dream!
  
• This theme is great, because you can use lots of primary colors in red, blue, and green, ie: storage containers, bedding, blankets, floor pillows, etc. are aplenty.
• Use framed posters, prints, and shelves with railroad memorabilia for wall decor.
• If your child is into trains, a train table is the way to go. 
• Hang framed photos of bulldozers, diggers, dumptrucks, antique cars, or airplanes...
• Recreate "caution" yellow construction tape by painting as a border.
• Paint a "road" curving all over the walls.
• Hang construction signs on walls

These wonderful trains, planes, and automobiles room decor is from Land of Nod.