My puppy Enzo was (and sort of still is) the same way. After a exciting experience (agility class, rousing game of fetch outside, etc.) he seems almost more excitable than before. He is relentless in cramming toys against my leg to play MORE.
I ignore him, and he gets the memo, then realizes he's sleepy and relaxes
And yes, it gets easier as they get older.
Have you posted a recent pic of Enzo? I think I saw your first video of him around the same time I found out my lil' guy was born and I fell in love with your pup
