Purpose:Assisting teachers and parents better physics teachingAdvantages:Enrich children's leisure life, cultivate hands on ability, and consolidate knowledgeFeatures:Let them learn physical knowledge, hands on to form circuit, series circuit, parallel circuit.PROFESSIONAL ELECTRIC KIT: This interesting electricity science experiment kit suitable for them build electrical, which not only can improve their physics learning skill, but also can improve their hand ability.GREAT GIFT: The electricity experiment a great gift to further understand the basic principles, learn the basic electromagnetic experiments through our instructions, to do to know experiment. Size Chart: 14cmx9cmx3.5cm/5.51inchx1.384inchx3.5inch(package) Package Includes: 1 storage box6 cables5 small bulbs2 AA battery boxes1 pole single throw switch2 small lamp sockets Note: 1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.