Simple science doesn't just show children things that will happen for sure (like exploding baking soda and vinegar volcanoes), it also teaches them to ask questions, wonder "What will happen if...", and develop an experiment to answer the question. What will happen if you put leaves from your yard in different liquids?
Talk to your child about how sometimes we don’t know all the answers. ...And that’s great! When we don’t know something, we get the opportunity to ask another person or look up the answer on the computer or create an experiment to help us understand. When we don’t know something, we get to be scientists!