We started back to school after the holidays on January 7th. I decided to tweak our science a little so the older girls were assigned all the experiments in the next module first and then do all the reading. The twins are learning Newton's Laws so they had an experiment where they were to mix vinegar and baking soda in a large bottle. It was suppose to blow the cap off and shoot the other direction but they had a few problems, one of which was using baking powder instead of soda. Also, we didn't have a 2 liter so the vinegar bottle was probably a little too large.