Basic calorimeter activities: I'm looking for an easy Calorimeter experiment for heat capacity for Year 11 Physics students. Can you suggest some, please?

Basic calorimeter activities: I'm looking for an easy Calorimeter experiment for heat capacity for Year 11 Physics students. Can you suggest some, please?
This online resource introduces basic concepts of heat.
The resource gives details for an activity that focuses on determining the heat capacity of different materials.