This last Saturday was our homeschool group's science fair. Andrew decided to make a lava lamp. He actually made it at the beginning of January, but didn't have his presentation put together until Saturday right before the fair. Jon sat down with Andrew in the morning and helped him to understand why his homemade lava lamp works: the oil not mixing with the water. So, Andrew brought our kitchen scale and measured water into one water bottle, and the same amount of oil into another water bottle. He put them on the scale to show that the same measurement of each liquid had a different weight or density. Andrew's was the first presentation, and he did such a fantastic job! You never would have thought that he was nervous. Eliza's and Kate's project had to do with what we've been talking about for science. We've been studying plants this year, and they prepared a presentation about the parts of plants: the roots, stem, leaves, and flo...