For now, most of Kaji's exercising is inside. We play fetch, chase/tag, and he "hunts" for his toys. I hide them under pillows or blankets and he has to use his nose and ears to find it, then he leaps/pounces, and digs until he uncovers his treasure. It's really very cute.
We also like to visit his friend Missy as often as we can. They play chase and kiss kiss kiss until they're both tired. They walk together and play at the park too.