Fizzy Christmas Presents is a great science activity to do with the kids! Watch as they learn about the reaction between vinegar and bicarb soda, and find some hidden surprises.
In a glass, mix a few drops of food colouring with 1 tablespoon of water. Put 1/2 a cup of bicarb soda in a small bowl, and slowly pour the water/food colouring mix over it. Stir together until all the bicarb soda is coloured. You can repeat these steps as many times as you like to come up with different coloured mixes.
Have a look in your plastics drawer for ice cube trays, small plastic containers or any moulds you might have. Pack the mixture tightly into your mould. To create presents, half fill the mould and then add a little surprise (I used bells!) and then fill over the top. I added a small pipe cleaner “bow” to the top, but you could decorate with anything you like. I also did a few that didn’t have any surprises inside them using my Christmas mould.
Once your presents are finished, pop them into the freezer and leave for around 3hrs. You can take them out sooner or leave for longer if you like, but I found 3hrs was perfect for setting ours firm enough that they could be removed from the moulds without breaking.
Using droppers, paint brushes, spoons – anything you’ve got to help wet the presents, set your child up with a small dish of white vinegar and watch them explore the reaction the vinegar and bicarb soda make! As the presents slowly fizz, the surprises will be found!