Artstraws® are approximately 16" paper tubes used for engineering and construction, as well as arts and crafts projects. Artstraws® can easily be combined with glue, or simply pinching and threading it into another Artstraw. No connectors are needed. Three different assorted color sets contain Red, Yellow, Blue and Green straws. They are also available in White. Each package contains two instruction books, one for arts and crafts and one for design and technology.