Three demonstrations that the teacher performs and the students sketch what happens. The first demo - they can actually do as a lab. Its the warm beaker water experiment. Student should use red/blue pencils for this. Then you do use a "Convection Box" for number #2 and "Convection Tube Apparatus" (this might be harder to find). Five Pages.
These demonstrations are a great to introduce students to convection. This lab has good diagrams for student color where the heat transfer is taking place.