Tips for getting kids into baseball without forcing it?

My boys are 6 and 9. The older one played tee ball last year and seemed into it for about 3 games then checked out. Younger one hasn't shown interest yet. My dad was really hoping they'd play and I feel some pressure about it, not gonna lie. But I also don't want to be that guy pushing sports when they're not feeling it. How do you guys approach this? Do you just let them find their own hobbies or try to introduce them to your interests?