Need STEM activities for a science center or to encourage independent learning? Be sure to add these activity card to your curriculum supplies for students to work independently or as a classroom as part of your lesson plans. These seasonally-themed activities will help get kids engaged in STEM! Contains 30 double-sided cards with the challenge and materials needed on one side and explanations and hints on the back. Paper. (30 pcs. per unit) 6" x 8 1/2"