This is a school-wide monthly challenge activity that I have developed for my own building. Each classroom will receive the materials needed to complete the challenge (plastic tub, growing creature and lab pack) and classrooms will post their results in a central location. The classroom that has the largest amount of growth at my school wins a growing creature gift basket. I got the growing creatures from our local dollar store and from Amazon.
This is a great way to get whole building involvement in science! We use this monthly challenge in SEPTEMBER!