This invention filters dirty water and removes germs., Foldscope, Windmill, LifeStraw, This invention helps people carry water more easily., Solar Stove, Hippo Roller, Socket Ball, This invention uses sunlight to cook food., Solar Stove, Foldscope, Windmill, This invention is a paper microscope., Foldscope, LifeStraw, Hippo Roller, This invention creates electricity when people play soccer., Windmill, Socket Ball, Solar Heater, William Kamkwamba built this invention using old bicycle parts., Solar Stove, LifeStraw, Windmill, Which invention helps prevent diseases from dirty water?, Foldscope, LifeStraw, Socket Ball, Which invention can help people study at night?, Solar Stove, Hippo Roller, Socket Ball, Which invention rolls on the ground?, Hippo Roller, Windmill, Foldscope, Which invention helps reduce smoke from cooking?, LifeStraw, Socket Ball, Solar Stove, Which invention uses wind energy?, Windmill, Foldscope, Hippo Roller, Which invention is used to see tiny things?, Solar Stove, Foldscope, LifeStraw, Which invention is best for clean drinking water?, Socket Ball, Windmill, LifeStraw, Which invention is shaped like a ball?, Solar Stove, Socket Ball, Foldscope, Which invention is made from paper?, Foldscope, Hippo Roller, Windmill, What does the Solar Stove use for energy?, Wind, Water, Sunlight, What problem does the LifeStraw solve?, Dirty water, Heavy bags, No internet, What does the Hippo Roller help people do?, Charge phones, Carry water, Study diseases, Which invention is low-tech but very useful?, All of them, Foldscope, LifeStraw, Which invention helps protect forests?, Socket Ball, Windmill, Solar Stove, Which invention was invented by a young boy from Malawi?, Windmill, Solar Heater, LifeStraw, Which invention is easiest to carry in a backpack?, Windmill, LifeStraw, Hippo Roller, Which invention helps scientists and doctors?, Socket Ball, Solar Stove, Foldscope, Which invention helps families transport large amounts of water?, LifeStraw, Foldscope, Hippo Roller, Which invention turns movement into electricity?, Solar Stove, Socket Ball, Windmill, Which invention helps people cook without wood?, Solar Stove, Foldscope, Hippo Roller, Which invention is eco-friendly because it uses renewable energy?, Windmill, Solar Stove, Both a and b, What do all these inventions have in common?, They are toys, They help people solve problems, They are expensive.

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