I use this Prof du Jour with my Grade 1/2 Core class. They bring in an item, almost like show and tell and describe it to the class. They also ask a couple of questions to their peers. They get really excited about it!
This was used in my 4-8 Core FSL classes at 'Term Around'. Term Around is after Term 1 reports have been sent home and students are asked to set their goals for term 2. This can be used at the beginning of the year as well!