Set includes 705 pieces in various colours: green straws (73), blue straws (90), yellow straws (77), red straws(76), orange straws (80), yellow connectors (63), blue connectors (63), green connectors (63), red connectors (63), orange connectors (63). "Build a fort, rocket, boat, tower, tunnel or bridge. Design your own scientific model or create a unique contraption. The straws fit snugly onto the connectors, but are flexible so you can build arches or tubes. Follow the illustrated instructions or encourage children to create their own unique designs. Cut the straws for even more design flexibility."--Box.