It depends how old your kids are.
PS2 has ok graphics, but a HUGE selection of games
X-box has awosome graphics, but doesn’t have a great variety of kids games. so if they are younger than 10 i wouldn’t recomend it
Game cube has okay graphics, but has a bunch of kids games.
If your kids are younger I would go 4 PS2 or gamecube, if over 10, then X-box or PS2.