Create bold strokes of color and watch them magically change when you add water. Rainbow Sparkle Gel Crayons are made with a solidified gel that makes bolder and smoother strokes than normal crayons. Add a wet paintbrush for watercolor effects for truly unique works of art. Comes with 12 colored gel crayons with a thick contoured grip for comfort. Also writes on black paper. Ages 3 and up. Measures 8.5 x 0.8 x 5.5 in.