Makedo with this useful Scru Combo set! Build, make and create more complex cardboard designs and work collaboratively with other makers. Use the Scru-Driver or Mini-Tool to screw the Scrus into the cardboard. The Scrus easily connect (up to three layers worth) into cardboard. Scru+ are for tougher materials and connect up to six layers of cardboard. Makedo conforms to EU REACH / EN71 toy safety standards. Makedo - Scru product features: 120x Scru - connects three layers of cardboard 40x Scru - connects six layers of cardboard 4 years + Needs to be used in conjunction with a Scru-Driver or Mini-Tool