Strictly speaking, I'm too old for this game but I don't care its more fun than those boring gameboy thngs (is gameboy still current? I don't know)
Anyway, it is a learn your alphabet flash interactive game. It uses paintings and objects from the Walker Art Gallery's collection to illustrate letters of the alphabet. It's all linked into the Big Art for Little Artists gallery.

I'm only up to D so far, I'm curious to see what they've chosen for X.

Link to Big Art ABC game