Getting a Wii - can someone explain difference between remote and nunchuck?

[titchy]

What is the difference between the two? What do you need two of so dcs can play for example tennis together? If we got Wii fit would we need any other accessories? Do you need a memory card as well?

Excuse ignorance but have the opportunity to buy one very cheap if I put our order in now!

Wii fit is just the CD Rom and board - nothing else needed, stick the cd in the Wii and follow the directions

no you need remotes for wiifit for jogging, and two for two player jogging