The PINVNBY 15 Pcs Rabbits Lava Blocks Bunny Teeth Grinding Stone is made of 100% natural lava rock that is safe and non-toxic. It is ideal for use as a chew toy by small animals such as rabbits, chinchillas, hamsters, guinea pigs, gerbils, and birds. The PINVNBY 15 Pcs Rabbits Lava Blocks Bunny Teeth Grinding Stone is available in 15 pieces so that you can give them to your furry friends as a gift on Easter, Valentine’s Day, or any other holiday.