The best games involve tennis balls, Frisbees or any other object that your dog can retrieve. It teaches the dog to return to you. Also bleached special bones made of synthetic or hard plastic and rubber objects can serve the same function. Discard the toy if your dog succeeds in biting off pieces. It may seem strange, but your companion need to have access to water even more in winter to prevent dehydration.
Humidity is much lower in winter.
Make sure you inspect water dishes frequently and have water available all the time. Some of these any other safety tips are available from the AKC . If you are not sure, ask your vet or breeder for more information.