Bacteria are very small creatures.

Some bacteria are good and help our body, and others are bad and can make us sick.

Think of your body like a garden. The good bacteria are like green gram plants: small, healthy, and gentle workers that protect the soil and help other plants grow.

When bad bacteria enter our garden, they can grow a lot. If too many bad bacteria, it is like weeds taking over the garden.

These “weeds” push out the good plants and make the garden (your body) feel horrible.