Hand-crafted observation box to hang on a wall to observe the female Mason Bees gathering clay, pollin, and laying her eggs. Then carefully watch the baby bees eat pollen and spin their cocoons. The box may be mounted horizontally or vertically and is approximately 5 5/8”Lx 4 7/8”Wx 2 1/4”H. Great teaching tool for children learning about Mason Bees. Includes two mounting screws.