Three short lines, and almost nothing happens. The speaker simply names a favorite: a hole called Thunder Dragon at a miniature golf course called Lee's. That plainness is the point. There is no explanation of why the game is loved, no story around it, just the name and the place, offered the way you might tell a friend about something you like.
What the speaker feels comes through in the word "favorite." It suggests simple, uncomplicated enjoyment, the kind that doesn't need defending. The name "Thunder Dragon" adds a playful note, since it sounds enormous and dramatic for something as small and homely as a putt-putt course. That gap between the grand name and the "miniature" setting is gently funny, and it hints at how a child, or anyone with a child's spirit, can find real excitement in a modest place.
The mood is light, warm, and a little nostalgic. The poem leaves us smiling, and perhaps remembering a favorite spot of our own.