Soil: Farmer Daisy's Farm

On Farmer Daisy’s farm, the vegetable patch has a little glass window in the ground, so you can see the soil from the side with its earthworms wiggling. Next to it, compost bins full of old leaves are slowly turning into rich, dark soil.

Remember: Soil is a mix of tiny bits of rock, humus (rotted dead plants and leaves), water and air. Sand has the biggest grains and lets water drain away fast; clay has the tiniest grains, feels sticky and holds water. Earthworms help by mixing the soil and making tunnels for air and water. The dark top layer is topsoil, and new soil takes hundreds of years to form.

Magic trick: Soil has 4 ingredients: rock bits, rotted leaves, rainwater and room for air.