Strawberry amigurumi. It's made of yarn, so it's light and easy to carry in their mouth, and cats love to play with it! Even when the owner is resting or working, the sound of it rolling on the floor won't bother them, so the cat can play with it whenever they want! My cat often rolls it around and has fun playing with it by themselves. To prevent accidental ingestion, I haven't used any small parts, and the whole thing is knitted with yarn. I use 100% acrylic yarn.