Earth Day Craftivity. Did this with 5th Gr., researched various countries problems; pollution, endangered species, etc. wrote on hearts & added a star in the middle explaining how they could be a good steward & their plan of action.
I really like all of these ideas for learning about the heart because they can be used for many ages. Some of the younger children may find the model of the house representing the heart easier to understand and more relatable. School age children may find the actual heart and body activities as more of a challenge and enjoyable project. This can help children going through something cardiac related understand procedures or problems occurring.