There's no better way to learn that doing. The hands-on
materials of this interlocking piece construction kit allows
children to assemble a series of six working models that use
gears to function. As they build the models and see them move,
your child will learn how gears can easily reduce or increase
speed, change force, or transfer motion from one position to
another. The six models featured with instructions include a
gearbox, hand drill, egg beater, helicopter, rotating sign post,
and a high speed fan. Also included is a 36 page activity book i
with innovative experiments and detailed explanation of the
different technological principles applied. Reccomended ages 8
and up. WARNING: Choking Hazard - Small parts..Not for children
under 3 years.