Diwali Celebration

I am working in MNC in the Human Resources Function
With Diwali just round the corner, we need to come up with a celebration plan.
Can you please suggest some competition for the large audience of 500+. In recent past i have already did rongoli, bay decorate, dance competition, ethnic wear, Drawing. apart from something you can suggest pls

- Can try team selfie - Respective team can capture freezing moments and you can judge which is the best moment
- Can try Greet other team - keep a gift box in the center each team can give any gift to respective chosen team