The sum of $2 + 2$ is $4$.

Would you like more details or have any questions?

Here are five related questions to explore further:

1. What is $2 \times 2$?
2. What is $2 + 2 + 2$?
3. How do you subtract $2$ from $4$?
4. What is the square of $2$?
5. How do you represent $2 + 2$ on a number line?

Tip: When adding numbers, you can think of it as combining groups. For example, adding $2 + 2$ is like combining two groups of 2 to get 4.