Most all hobbies are. Just think about ice hockey: Skates, shields, sticks, licenses, team memberships... Or horseback riding: Saddles, clothing, horse, stable... Or any motor sports... Or scouting: Clothing, backpacks, wanderings, jamborees... Or any other woodworking: The wood, tools etc...
I'm surprised that your dad doesn't have most of the tools already, having read how handy he is and how he's got a lot of tools!