When we talk about increase, think about blowing air into a balloon. At first, the balloon is small, but as you blow more air, it gets bigger and bigger. The balloon is increasing in size because you are adding more air.
Another way to understand increase is by thinking about stacking blocks. If you have a few blocks and you stack more on top, your tower gets taller. Each block you add makes the tower increase in height.
Consider a garden with a few flowers. If you plant more seeds, soon you will have more flowers. The number of flowers is increasing because you planted more seeds.
Imagine a jar of cookies. If you put more cookies into the jar, the number of cookies increases. More cookies mean more happiness!
Think of a path where you start with a few steps. If you keep taking more steps, your journey increases in length. Each step adds to your adventure, making it longer and more exciting.