Image Item No. Description  9664  Early Simple Machines II Teacher's Guide (Primary Simple Machines Activity Pack) - 209664, 2009664, 4118584 Catalog: Books: Curriculum Activity Book: Educational & Dacta: DUPLO  2009684  eLAB Renewable Energy Activity Pack Catalog: Books: Curriculum Activity Book: Educational & Dacta: Technic: eLAB  2009618  Structures Activity Pack Catalog: Books: Curriculum Activity Book: Educational & Dacta: MINDSTORMS