Penguin Crystal Growing Kit - a fun way to learn about growing crystals! (Age 10+) Learn about the science of crystals; consists of pre-cut cardboard pieces to construct a playful penguin Crystal growing solution is then poured into the base to soak through the cardboard The penguin is pre-treated in white dye which will give your growing crystals the look of a penguin The penguin begins to show crystals in a matter of hours and is fully grown in 1-2 days depending on humidity & sunlight; grows up to 5 inches tall Styles available in separate listings - Magic Garden, Green, Orange or Yellow Tree, Sheep or Penguin; Ship size: 9x6x2 inches