OOBLECK. This stuff is amazing. Mix 2 cups of cornstarch and 1 cup water in a bowl. To color oobleck, add a few drops of food coloring to the water before adding to the cornstarch. Takes some effort to mix the water and cornstarch. Oobleck defies Newton’s third law of motion–for every action, there is an equal and opposite reaction. If you quickly smack oobleck with your hand it immediately turns into a solid, instead of splashing or moving. If you slowly move oobleck it reacts like a liquid.
Soak orange peels in vinegar for two weeks in a sealed mason jar then pour the vinegar into a spray bottle. Use as a non-toxic and yummy smelling "green" cleaner. I love using vinegar to clean with but have always wondered how to make it smell better - can't wait to do this!