show-and-tell 
noun [mass noun] chiefly North American
A teaching method, used especially in teaching young children, in which pupils are encouraged to bring items they have selected to class and describe them to their classmates: I was the kid in the neighborhood who caught black snakes and took them to school for show-and-tell [as modifier]: a show-and-tell style...
- Use pictures as a show-and-tell vehicle for your young one to help bring family elders to life.
- The nice thing is, it allows them to easily take their garden to school for show-and-tell.
- If need be, drag her onto the bed with her jewelry box for show-and-tell.
