* Crickets aren't a natural prey item for cats. Cats are primarily carnivores and their natural prey consists of small mammals, birds, and occasionally reptiles.
* Crickets can be harmful to kittens. Crickets can bite, and some species can even carry parasites.
* Cats are typically very protective of their kittens. A mother cat would be unlikely to bring something potentially harmful near her young.
If you're seeing a cat bringing something to its kittens, it's much more likely to be a small mouse, bird, or even a toy. It's a natural instinct for mother cats to teach their kittens how to hunt and eat.
If you're concerned about your cat or kittens, it's best to consult with a veterinarian.