A baby animal is small and grows bigger as it gets older.
A kitten is small enough to hold in your hands. As it grows into a cat, it gets bigger. Almost every living thing starts small and grows.
More facts about Opposites Size
Big and small are opposites — an elephant is big, a mouse is small.
Tall and short are opposites, like a giraffe and a rabbit.
Long and short can describe size, like a snake and a worm.
Wide and narrow are opposites, like a big river and a thin stream.
The biggest animal ever is the blue whale, bigger than any dinosaur.