I was disappointed with this game. Minutes after staring I discovered that you actually need 2 players in order to play properly. If you want a turn drawing yourself, a second person needs to be present in order to guess your drawing!! (therefore a pen and paper would be quite sufficient instead of buying the game!) The computer cannot guess your drawings.
However you can play as a single player, just guessing the computers drawings (but where is the fun in pictionary without drawing your own eh??) Even in this mode, again it is disappointing, as the computers "Americanisms" often make it difficult to guess the correct answer (I am 26 years old - so think this would be impossible for younger children playing the game!)
Overall I would not recommend it for a single player, however, if you do have more than one person around to play, it has the potential to be a lot of fun.