Yipee for the new milestone!

I think a cat is a great idea, and your son is old enough for this to also be a good lesson in responsibilities. Finding a cat which is also sensory seeking will be key (mine has proven not to be so and also avoids the kids as much as she can), but I expect spending time at the local shelter socializing with cats waiting for adoption to find the right match would be a treat in and of itself wink