I think we could probably do this science experiment everyday by the reaction of everyone. At first everyone watched in surprise as the first coloured vinegar reacted with the baking soda and fizzed madly. Then there was a group eagerness to add more colours to see what happened. It was only then that everybody individually commented on the play with a 17 month old saying bubbles, and the two 40 month olds commenting not only on the chemical reaction but also the colours and the effect of mixing them.