Enhance light absorption and luminescence-put these exquisite marbles in the sun or expose them to ultraviolet light to absorb energy. The these glass balls absorb, the brighter the light they emit. Experience their luminous charm at night. High quality technology-made of high quality glass, luminous marble is . Their smooth surfaces seamless rolling of marble running toys. Endless entertainment for all ages-Our luminous marbles are charming and versatile, and are ideal for marbles games, such as marbles and traditional games, no matter day or night. Pinball enhances hand-eye coordination and fine motor skills, and cultivates quality contact time between parents and children. Multi-purpose-in addition to games, luminous marbles can also be used as vases, gift bags or fish tank fillers, as well as elegant table decorations. Be , roll, throw or integrate marbles into DIY projects to decorate your living space. Value-for-money set -20 luminous glass balls (0.63MM in diameter, slightly different due to manual measurement) with 10 different Colours are perfect birthday gifts for children. Colour:As Shown Material:Glass Package Contents: 20x Luminous marble(10 Colours, 2 each) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the Colour of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.