Prepare cards with names of hobbies and add some commentaries. The students take one card each, without showing them to one another, and then ask each other questions, and guess what hobbies are mentioned on the cards and why they are chosen.

e.g.
1) Collecting water bodies where I swim, because I like to travel.
2) Growing most ugly plants in my garden, because I like everything out-of-ordinary.
3) Take pictures of insects because I like both biology and photography.
4) Collecting stamps, because I hope to sell them and become a millionaire.
5) My hobby is embroidery, because it pacifies my nervous system.
6) I like dogs and train them to do funny tricks.
7) I collect different jokes and anecdotes to entertain my guests.
8) I am fond of growing huge pumpkins and participate in autumn competitions in throwing pumpkins.

Instead of hobbies you may write different professions: e.g. plumber, veterinarian, accountant, jeweler, literary critic, air traffic controller, stock keeper, beefeater (guard in the Tower) etc.

The same may be done with simple pictures: give them out to students and they are to ask questions to guess what is shown on a card of his neighbour.