This glow panel set comes with three glow panels in three different colors. Stimulate the senses with blue, green and yellow! Watch the liquid flow and swirl. Children will love the vibrant colors and smooth surfaces. Small hands will have no problem gripping the large handholds with rounded edges. Just 15 minutes of sunlight will activate these panels for about 6 hours. These durable rubberwood panels are designed to last for years without scratching, leaking or breaking. For ages 12m+. Size: 7.25"L x 4.5"W. Size of lens: 3.2" dia.