Do your cats like water too? Just try it. All you need is a bowl or a not too deep bucket of water and a few balls that can swim - waterproof cat toys are also a good idea.
This homemade cat toy awakens the cat's curiosity and hunting instinct and appeals to all the senses. No wonder these two have so much fun!
You can find cat toys made of other materials such as cardboard or toys with catnip here.