Learn how by connecting many levers together you can create models with complex motion. Learn how such links can be applied on various machines and build 6 working models including a mechanical extendable arm a lifting platform a pantograph a moving figures toy a folding ladder and a parallel weighting scale. A 36 page activity book is included with innovative experiments and detailed explanation of the different technological principles applied! Booklet with detailed building instructions also included. WARNING CHOKING HAZARD- Small Parts. Not for Children under 3 yrs