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Ginormous Growing Cobra Snake Grows from 12 inches to 5 feet
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Place this 12 inch Ginormous Cobra in water and watch it increase in size. Grows up to 5 feet in length after several days.  Seriously BIG FUN!  Makes a fun way to teach measurement. Can be dried out and grown over and over.  We tried them and were amazed how big they grew. Put your grow cobra in a tub or bucket of cool water and watch it grow!  The day to day change in size will keep kids interested.  They can even keep charts on its progress, or buy two and have a growing contest.  Build them a home, they will never dissolve or turn to mush.

Growing animals and other things (brains, dinosaurs, insects) that are made to increase their size in water are made up of two polymers.  One is poly(vinyl acetate) which keeps the original proportions and shape of the item or creature and the other polymer is polyacrylamide which is the super absorbent polymer.  The growing creatures have many teaching applications in science and math, including graphing, drawing conclusions, and measurement using linear, mass and volume. The

  • Growing Creatures Book by Anne Linehan and Betsy Franco details measurement and data collection projects integrating math and science.
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