If I had to choose my favorite subject ever it would have to be science. Hands down, no doubt, final answer, I love all things science. I have made baking soda volcanos, grown crystals, cracked geodes and more with my kids just for fun -- well and to help them earn an appreciation of science. There are so many great apps out there to help build a strong foundation in science for kids.
I have listed many great apps as well as links to lists of other science apps from the same developer. So be sure to click and head over to see all the FREE apps from NASA, BrainPop and The Lawrence Hall of Science.