Sometimes you play for the sake of challenge. Sometimes you play for the sake of character and charm. Games for kids these days seem sorely lacking in both, but in the case of MySims Agents, the game has a lot more in common with hard boiled detective fiction (and maybe more in terms of gameplay than plotting, though it contains a elements of that genre in both), and I find that charming.
To read more:
Hard Boiled Heroism For the Kids: MySims Agents