The built in picture game
Gameplay: In this minigame you can draw and talk using the touch screen on the ds. This is very easy to use and without reading the instruction booklet, you'll understand whats happening.
Graphics: the graphics are as good as you can draw. since it is YOU drawing and typing in little messages to friends.
Sound: This game doesnt really have any sound. there is aonly a bell sound when you enter/exit a room. Other sounds include: the noise when you type in things, and the sound of the 'pen on the paper' and when you 'rub things out'
Value: well you paid the amount you did for you ds/ds lite to play other games, not pictochat, but you dont have a choice do you? its a good freebie and it amuses little children quite easily (my little sis and bro)
All in all, it is fun for little whiles as long as there is someone there and you artistic work isnt going to waste.