Celebrate the 100th Day of School with this fun, engaging, and hands-on STEM activity pack! Students will randomly select from STEM challenge cards, encouraging critical thinking, problem-solving, teamwork, creativity, and engineering skills—all centered around the number 100. These low-prep, printable STEM challenge cards are ideal for STEM centers, morning work, small groups, early finishers, or whole-class activities. Simply print, cut, and place the cards in a jar or envelope for students t