are super active and do all kinds of fun things with their kids all the time.
Some of the fun of parenting is sharing your interests with someone new, a complete beginner to that thing. Some of your hobbies become their hobbies (my kids have taken an interest in cooking and helping in the kitchen, love some of my favorite childhood books/movies, tinker with legos), and some of them don't (trying to teach my kids how to play chess or sports have been mostly unsuccessful).
But it inspired me to take them to the library and museums and even vacations that I wouldn't have otherwise done. It also helps inspire me to keep in better contact with my parents and siblings (and their kids), because it's important for me that my kids have relationships with their grandparents and cousins. But the side effects is that it makes me stay in better contact with my own family. So it becomes a forcing function, that is only kinda a burden to the extent that I might rather be doing something else, that I learn to appreciate in the long view.