Took my lad to his first match when he was 3 vs Swansea. Vardy scored after 15 mins. Picked him (the lad) up to celebrate and cried. Best moment of my life!
Enjoy the moment and dont get too stressed. There will be too much going on for him to notice too much.
Cardiff fans can be a bit feisty, and they are anti-English, but me and my lad sat in their home end vs Norwich last season, and they were brilliant. 'Men of Harlech' was genuionrly a goose bump moment.
Fyi my lad is now 8 and loves a good "who are ya?" "you've only come to watch Leicester" chant back at the away fans!