We bought a Wii for prescription drugs a Christmas gift for my children (ages 4-11) and we know we have to buy at least one more controller & nunchuck controller.

We have no other nintendo game consoles (no gamecube or anything).

Do we need the regular controller (looks like an original controller)? A memory card?

Which is the best "gun" controller for Call of Duty or games like that?

Best games for adults & kids to play. Any help would be grateful. We’re going shopping this week to pick the stuff up.