"The air around us is made up of gases. We breathe in some gases. Some gases help balloons float! With age-appropriate critical thinking questions, young readers will learn all about the gases that surround them."--
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"The air around us is made up of gases. We breathe in some gases. Some gases help balloons float! With age-appropriate critical thinking questions, young readers will learn all about the gases that surround them."--
Read Less