Take your puppet away with you and take some photographs of him/her in different situations and show the class. Or tell the class that your puppet is still away and send them as postcards. (like in the film Amélie) For some reason that I still can't understand (and no physcologist has ever been able to explain to me) why students find the life of Manu and Charlie a lot more interesting than my own.
To exploit this curiosity of the students, take photos of the puppets in various situations or with people that you (your puppet) comes across in different places. Here's Manu in Valencia with some girls in their Falla finery. When you explain what you are doing, people are generally very happy to have their photo taken with the puppet. If you have IT skills then you can easily photoshop your puppets on holiday or in front of iconic buildings.
Then show your class the exploits of your puppet - and hopefully they'll ask you questions.