Counting out a set is harder than counting what is there. This Pre-K color shapes to show numbers up to 20 worksheet fills four bags with outlined shapes. Each tag names a number and a shape, such as 14 circles or 15 stars. However, every bag holds more shapes than the tag asks for. The child colors the right amount and leaves the rest white. So the real lesson is to know when to stop, a key step toward understanding numbers.