In celebration of National Science Week we have a whole selection of fun activities to try at home. In today's science experiment we are going to explore physics in the bathroom. Bathtime is a great time to play and these games can be enjoyed by babies as well as big kids.

Bathrooms are full of interesting objects – from bath toys to bars of soap. We are going to use these to test whether they sink or float. Before you begin, gather some more items from elsewhere in the house, a shell, cork, plastic bottle, stone and leaf are all fun to experiment with.

First encourage your child to put them into groups of what will sink and what will float. Take a good look at the materials used for each and then test them out to see which ones float and which sink. This allows your child to consider different materials and help them in observing and grouping objects.

After exploring their properties, the objects can be used to create an underwater world on the bottom of the bathtub.

Happy experimenting!

Melissa Corkhill is the editor of The Green Parent magazine, mother of two and author of the book Green Parenting

About The Green Parent

The Green Parent is the UK's leading green lifestyle and natural parenting magazine. A truly inspiring read, TGP is like nothing else on the newsstand, with insightful intelligent journalism covering topics from babywearing and attachment parenting to home-education and alternative medicine. Each issue features regular columns on Organic Gardening, Seasonal Food and Drink, Green Travel, Ethical Fashion and lots more. Read more about Green Parent »

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