My son is 2 1/2 and loves to do jigsaw puzzles but with lego, he seems not very interested yet. Maybe 3d reasoning develops a bit later.. But for around that ag

My son is 2 1/2 and loves to do jigsaw puzzles but with lego, he seems not very interested yet. Maybe 3d reasoning develops a bit later.. But for around that age or a bit older like 3-4, what sets work best? Simple block sets? Sets that include small lego people? Thank you. I grew up behind the iron curtain and lego wasn’t available until I was a bit older and we were playing with other things