Working out where the ball will go on it's rebound is relatively complicated, and is sure to get them thinking in a physics-y maths kind of way. Peggle will also teach them (and you) about perseverance.
Nothing. At all. Unless you don't like unicorns and rainbows.
Peggle does have multiplayer - although it's only a competitive, see-who-can-get-the-best-score game. Still, maintaining the series' "one more go" mentality, it's bound to keep you playing for a while...
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