When we say two things are similar, it’s like saying they are friends. They might not be exactly the same, like twins, but they have things in common. Think of two different kinds of cookies, like chocolate chip and oatmeal raisin. They both have sugar and flour, but one has chocolate and the other has raisins. They are similar because they are both cookies, but they have different toppings.
Another way to think about similar is like looking at two different shapes. Imagine a square and a rectangle. They both have four sides and four corners, but the sides of the rectangle are not all the same length like the square. They are similar because they both have straight lines and corners, but they look a little different.
Similar can also be like two colors, like light blue and dark blue. They both have blue in them, but one is lighter, like the sky, and the other is darker, like the ocean. They are similar because they are both blue, but they are not the exact same shade.