#libre #games that have gone well with my 5 year old son: Tux Paint, Super Tux Kart, Extreme Tux Racer, Tux Football, Super Tux 2 (how is this different than reTux?), #freedoom, !minetest, gnome-nibbles, Implode (from #sugar, I wish it were standalone), jumpnbump, and Frozen Bubble.