Category Description for STEM Challenges Activity Cards: Bringing STEM alive to children need not be drudgery for you or them! Let's face it, the purpose of STEM is not only to teach children scientific processes and thinking but also to EXCITE and ENGAGE them in the sciences! Using commonly found items, these double-sided cards provide a clear challenge and visual list of supplies on one side, and extension questions, hints and simple explanations of the science on the reverse side. Activities are easy to implement, and can be completed with an individual child or group. Each boxed set includes 30 glossy cardstock cards that measure 7 ¾" x 5 ½', and divider tabs. Flexible for homeschool families, co-ops, library programs, and learning centers.~ Deanne