We made predictions about what would happen when we put vinegar on top of bicarbonate of soda. Some of us got it right.  We decided to make our own volcano out of plasticine. We chose plasticine because it is waterproof.  The volcano was put into a bowl to make sure it didn't make a mess and the bicarbonate was put in first followed by the vinegar.  We were amazed at how much the volcano erupted.  The smell was terrible but we had a lot of fun.

Float or sink?

We made guesses as to which items we thought would float or sink.  We wrote down our answers and tested them out.  We were very surprised at some of the items.  Afterwards we had plasticine to make our own floating vessel. It was very tricky but we had fun.