depends on how deep is your pocket & how old is the kids

If pocket is deep enuf, go for the PS3 + Move package then, damage might be around RM1.8k++ with 2 move controllers & a game.
But prepare for 2K to be safe
PS3 games for kids also are limited

If budget concise, Wii wins hands down. Basic Wii package + 1 extra Wiimote won't cost you more than 1k. Game library for kids also wins hands down.
Extra wiimote also cheaper than move, kids spoilt your controller also won't sakit hati that much

And last option, which I'm sure many will tell you to do is...
Buy both
PS3 for you to play GT5 & adult oriented games
Wii for the kiddos
Problem solved