At DS' primary school they go every year to the modern art museum and look at a temporary exhibition, then do some art based on it. When he was 5yo he was introduced to Miro and has pointed at anything slightly abstract (graffiti, broken box, a rug whatever) as 'That's Miro'
. They then did a small tapestry Miro on mini looms, we still have it. They've also done a sculpture of a man walking, out of tinfoil (he was asked 'but where are his arms?' and answered 'close to his body because his hands are in his pockets'). DS is only 8 and still obviously doing primary-age stuff, but it gets him thinking about different things, it's given him confidence in his own drawings - which are frankly appalling, but he sees perfect stick people where i see wobbly lines, he has no talent whatsoever but takes great enjoyment out of it - that's art to me (for his age).
I did art to A level, and we have lots of art boks in the house and some original paintings (one by my dad, one by me, two by a friend, another from a street artist etc), quite different styles, so he sees art daily. In fact after his initial Miro obsession i painted (copied) one and it's his favourite thing in his room.
I thnk art until 14 is great if you have a fun teacher who encourages everyone and who uses (or the curriculum allows for...) different medium. At secondary we did watercolour, oils, acrylics, pencil, lino, pottery, weaving, screen printing, junk modelling etc. (back in the 90s) if you weren't very good at one, you might be not too bad at another.
Pin art, macrame, pasta pictures, papier mache, spirographs... all that type of stuff i did at home with my mum and i do at home with DS. Dad taught me woodcrafts and how to fix a bike, wallpaper a room etc.