Cactus is a unique plant because it can grow for a long time without water. Cactus habitat is dry areas (desert). Luckily overcoming the lack of water, the cactus has long roots to look for water and widen the absorption of water in the soil. Water absorbed by cactus is stored in the space in the stem. Cactus also has leaves that change shape to thorns so that it can reduce evaporation of water through the leaves. Therefore, cactus can grow for a long time without water.
Below is a collection of Cactus Coloring Page that you can use as a medium for your children to color.