YELLOW CIRCLE LIGHT SHAPES are circular badges about 3'' in diameter that Glow when squeezed. Squeezing breaks an inner ampule allowing 2 chemicals to mix and create a bright Glow. Each badge has self-adhesive backing allowing it to be stuck on almost anything. Priced by the individual piece but packed in bulk bags of 10 pieces per color. Please order in increments of 10 pieces per color.