A sleeping bag is a blanet used for camping. Construct several tents out of tag board and color them using primary colors. Make an identical set out of white tag board and print the corresponding color names on this set. Laminate the materials. Staple the tents with the color names onto the bulletin board.
Children can attach the colored tent to the corresponding color word.
You can use velcro or sticky tac to do this. Another bulletin board idea that is more for decoration purposes would be to put a large tent in the middle of of the board. Add figures of boys and girls who are dressed for camping. I added backpacks and a walking stick for fun. Make a campfire with a child in front roasting marshmallows on a stick.