It can be printed with colorful designs, or solid in color. You can also cut your own squares, if you're very careful to measure and cut precisely. Just take a clean-edged, rectangular sheet of paper and fold one corner over to the opposite edge, and cut along the resulting square edge. If you do choose to make your own, use something light, like wrapping paper or magazine pages. You'll find it easier to follow origami diagrams if your paper's front and back do not match.
Origami is a lovely art, but for some folks it's frustrating before it's rewarding.
Be prepared to make mistakes and perhaps start all over again. Having this attitude will reduce the frustration index considerably. A crane is probably the most famous of all origami figures. In Japanese culture, the crane is a powerful symbol and people may fold a thousand of these birds for someone they wish well. The bird figure presented below takes far fewer steps, but it's still completely satisfying to make.