Dog toys can be categorized based on age, size, and lifestyle needs. For puppies, soft and teething toys are essential. Adult dogs benefit from toys that promote activity and mental stimulation, such as puzzle toys and Frisbees. Senior dogs may prefer treat-dispensing or plush toys, with options like noise-making toys for those with poor vision or light-up toys for deaf dogs. Larger dogs need durable, tough toys, while small dogs require appropriately sized ones to avoid injury. Interactive and glow-in-the-dark toys cater to different playtime preferences and safety considerations.