Need a whole year of preschool STEM challenges planned and ready to bring into your classroom How about challenges that only use simple materials?Get your youngest learners problem solving, working collaboratively and thinking outside of the box easily, with this STEM Challenge bundle.Interested in what STEM Challenges are all about? Check out this blogpost: STEM & Preschoolers- The WhyGRAB THIS BUNDLE & SAVEThis Bundle STEM Challenge pack includes 12 months of challenges, with 4 challen