I saw 2 before the first film as they both came out before I was born but what my mother and other family members have said I first saw 2 when I was 6 or so and was obsessed with it so much that I used to watch it 3 times a day until I saw titanic then it went to that anyway now as a 29 Yr old adult all the lethal weapon movies are definitely worth it if you’ve never seen it I’d definitely recommend