三棱镜长8cm，带塑料支架，适合低年级孩子使用，也适合居家装饰。

使用时放在阳光下，转动三棱镜直到在墙面上折射出彩虹。
Three prism length 8cm, with plastic stent, suitable for lower grade children use, also suitable for home decoration.
When in use, place in the sun, turn the three prism until a rainbow is refracted on the wall.