It refers to the sled he had as a little boy when he was taken away from his parents.
That time was the only time in his life that he was truly happy.
Basketball
You can purchase Air Bud movies from any movie store that carries them or by online shopping. Go to your preferred search engine and search "airbud movie shopping". It will come up with online shopping results.
Bud Harrelson is 5' 11".
Bud Brutsman was born in 1970.
Most of it was filmed in Vancouver, British Columbia, Canada. Some scenes were shot in Port Moody, B.C.