It's never too early to introduce your toddlers to science - you don't call it science, of course, but there are plenty of fun activities that you can do to help build an understanding of the world around them.  Here are a few ideas:-

Weather: Create a series of card pictures for different types of weather, and a picture for each of the seasons.  Each morning look at the weather and put the appropriate weather and season pictures up on the wall.

Faces: Create a large picture of a head and then create a series of different eyes, noses, mouths, ears, eyebrows, hair and pairs of glasses.  Have your toddler create faces, placing features in the right place.  Discuss different coloured eyes, different shaped features and talk about what glasses are for.

Planting: Buy some cress or mung beans, plant them in a plastic pot, water them and watch them grow.  Have your child chart the progress each day as they germinate and shoot up.  Discuss the ways that they change each day, draw how they look and at the end, make a sandwich and enjoy them!  Talk about how healthy they are and that good food makes you grow.

Colours: Show how mixing finger paints creates different colours.  Create swirling patterns on paper by pouring on generous amounts of paint and swirling with your finger.

Growing: Use a wall to mark the height of your children.  Have them stand against the wall, make a pencil mark at the height they stand and measure how tall they are.  Add a date, and repeat on the first day of each month.  Sometimes you'll see almost no difference, other months you might notice change.  Over a prolonged time you will see how they grow.  Discuss what makes you grow and the concept that your little ones are growing into big children.

These are just a few ideas, there are hundreds more activities that you can undertake with your toddlers to get them used to the concepts of science, and to spark an interest in the world around them.

Weather has a profound affect on us - it helps us decide what to do for the day.  Create a weather board with your children, make templates to represent sun, cloud, rain, thunder and other weather phenomenon.  Each morning, look outside and talk about the weather with your children. Place the relevant weather image on your board to describe the weather.  You can even do this exercise with babies, repeat the weather word to them, 'sun', 'rain', 'cloud' or whichever is relevant. Show them the picture and point between the picture and the sky.  In time they will begin to repeat sounds back to you, and will be able to point to the right picture according to the weather.  This will be communicating before they can even utter full words!  Record more detailed meterological information with older children.  For example, note whether it rained during the day, and how much fell.  Make a rain guage from an old plastic drinks bottle - cut off the top, mark lines on the side and number from the bottom, then leave it outside. Your kids will love an ongoing project and will learn loads about the weather!