The first experiment we had currants as well. We put the baking soda and vinegar in a tall chemical tube (called a measuring cylinder) and then put in about 12 currants. The currants sank to the bottom BUT the air bubbles from the baking soda brought the currants back up to the top and then it kept on going down and up from the bottom to the top and top to the bottom again and again. It would keep going until all the baking soda had dissolved.
For the next experiment we made a mini fire extinguisher by putting baking soda in a bottle, then adding vinegar. We had a cap on a bottle with a hole drilled in the top and we stuck a little bit of tube in it. We tried to blow out a candle with it as the gas came out of the bottle through the tube. Ours didn't work because we let our air out too early.
The last experiment we did was we put baking soda in a balloon and vinegar in a bottle. We put the balloon over the top of the bottle and tipped the baking soda in. The reaction made the balloon on top inflate. The gas rose from the bottle into the balloon and expanded the balloon as it needed more room.
The experiments were fun to do even though one of mine didn't work.
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