My students love the Grow a Creatures you can find everywhere lately, even at the Dollar Store. They come in dozens of different animals and designs. They all claim to grow 600%, but do they really? And if they do, are they measuring the growth in length, width, or area?
I designed this science inquiry project to find out. I just bought 6 different creatures (one for each table) for this investigation... so it is super cheap also!
Students will measure the length, width, and area (in square units by tracing their creature on a square grid paper and counting the square units) before soaking it in water and after. They will write a specific hypothesis (How big do you think it will get?) and make observations for three days before taking final measurements. They will describe the experiment and communicate conclusions while writing a letter to the manufacturer (included).
I also plan to graph each table's results on a class graph (not included). This is a fun way to get students thinking like good consumers while practicing using the scientific process and using measuring skills at the same time.