Polka dot plants (Hypoestes phyllostachya) are common houseplants with colorful foliar displays. They are highly hybridized to produce a variety of colors and types of leaf spotting. Also called freckle face plant, this houseplant can grow in any type of indirect light but has best color in lower light situations.  Sold in 2" pots.
 
Light: Bright light is best. Plants grown in poor light conditions are likely to have solid green leaves, which defeats the purpose of this neat little plant. If your plant isn't colorful enough, consider some direct sunlight, which should deepen the colors.
Water: Keep the soil moist in the summer growing season and reduce watering in the winter. If your plant flowers and then goes into a dormant phase, reduce water significantly and resume regular watering only after the new growth emerges. This plant prefers humid conditions, so you can mist its leaves or place its pot on a tray of pebbles filled with water to maintain high humidity.
Fertilizer: During the growing season, feed weekly with a weak liquid fertilizer that includes micro utrients and encourages blooming.
Soil: A light, fast-draining potting soil is perfect. You can use fortified soils.