Maybe someone has some unique pictionary ideas? Some that really get the quiet kids off their seats. THX
When you say pictionary themes, do you mean like food, animals, Chinese New Year, etc? Please clarify.
Meanwhile, I’ll just give some general advice that you didn’t ask for. It helps to make a list of words that the students are familiar with. You can also use the game to review specific vocabulary. If students are a bit older and bored with simple, obvious words like apple, dog, house, challenge them by throwing words that are more challenging to draw like ugly, cold, etc. Of course, higher levels can use more interesting and challenging words. To make the transition from objects to non-objects easier, you can let them see the list of all possible words. You could also have the students choose the words to draw.
For quiet students, games just may not be their thing. They may enjoy writing a skit/script with a partner. In my experience, quiet classes became more involved in small group activities with clear guidelines.