How to display and input numberic caharcter?

Hi..Im the beginner of using Arduino. I want to make a project called mathematics game for kids that need input from the kids to enter answer when a question display on the LCD. But i have no idea what should I use in order to make my project real and successful. Means that I do not know what type of LCD (to display character) should I have and what type of keypad(to enter number 1 to 9) should I use? And how to make connection between these 3 things (Arduino, LCD, Keypad) or anything else should be use? I think I want to use Arduino Duemilanove. I hope that someone can help me and give me some suggestion.Thank You.

Start simple - get a 12-key keypad, wire it up per the keypad demo in the playground, getting the key presses to appear on your PC.

http://www.arduino.cc/playground/Code/Keypad

Then add in the LCD screen next.

Little pieces at a time.

Hi there Teddy. I'm a beginner too working on a similar problem. So far I've gotten a keypad to do my bidding and as soon as I get my LCD I will integrate it with the display. You can see what I've come up with so far at: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1287289086