Photosynthesis made simple for the kids.

1. Photosynthesis
In the process of photosynthesis, plants convert light energy
from the sun into chemical energy in the form of glucose or
sugar.
Water + Carbon Dioxide + Sunlight Glucose + Oxygen
6H2O + 6CO2 + Light energy C6H12O6 + 6O2

2. Photosynthesis
Food for Plant
They use the sunlight and the green in their leaves to make sugars from
carbon dioxide (which they breathe in through their leaves during the day) and
water. This sugar is then used to give the plant energy so that it can grow.
This process is called photosynthesis and is the most important process on
the planet, as many other plants and animals depend on plants to survive.
Most of the energy is used to make new plant material, although some of it is
stored by the plant for use during the months when there is less sunlight.
A Breath of Fresh Air
During the night, plants breathe in oxygen. This is called respiration. The plant
also needs minerals to grow, which the plant takes from the soil where they
are dissolved in water. The plant releases any water that it doesn't need into
the air through its leaves. This is called transpiration.
Plants are the only living organisms that can make their own food. This is one
of the main ways of deciding if something is a plant.
Info courtesy of BBC Gardening Guide