OK, this is not really a bulletin board but I decided to share this idea. I gave my students inflated balloons and they used a mixture of watered down white glue and newspaper cuttings to cover their balloon. Once it dried (next day) I had them put another layer using white bulletin board paper strips. Once it dried, I had them paint their eggs any color. We then made a nest using brown bulletin board paper and placed all the eggs inside. I then cut out the words “Dinosaur Eggs”.