My 5th grader has a very ambitious project for this coming week. She wants to make a life size circulatory system for the science fair. She would like the lungs to inflate and the heart to beat.... i told her not to get her hopes up. She gets a participation grade only... so we are good with that.
I have been googling all morning and think it is best to use a variety of items: styrofoam balls, tubing, string, paper mache, etc.
But would LOVE any suggestions you might come up with.