I like the idea of the flirt pole for an adult dog (maybe even teenager too) but not sure about a puppy. I'm worried about jumping, lost teeth, landing bad...etc. OP, if I were you, I'd put it away for a while. It's great to know when the time is right your dog will love it...but it seems too risky now.
What about fetch, obedience training, chase, swimming (even a kiddie pool can be fun)? Oooo what about some sort of body awareness? Put your foot here...back your butt up here kind of thing?
We used a laser light before we knew better. Neither of our dogs became neurotic over it, but we couldn't play with it in the house-when they got along and were allowed to interact-it would cause a fight. Bailey would resource guard it. We moved it outside at night, because it was an easy way for us to tire them out without much effort from us. Then we learned about how bad it could be a decided to stop doing it. It's too the point now if we want (and we haven't in years) to play with it with the cats we have to put the dogs up.
After a bad experience with a spring pole I'm also very cautious about recommending them. If you decide to use one, make sure your dog is old enough, has a good "out" and it's low enough to the ground that the dog's back feet can touching. Our girl Bailey broke her foot a couple years back swinging on one-she let go and landed badly. There's also another member here-Leslie I believe who's dog had a bad experience with one-broken teeth maybe?? (can't remember)