DIY plunger CPR manikin

Homemade option using a plunger, a large piece of plastic, a lid, and a homemade head
Recycled materials:
→ 1 lid (eg. of a laundry detergent bottle)
→ 1 large piece of flexible foam/plastic, approx 30×12 inches (eg. old plastic sled)
→ plaster of paris strips or paper mache
Non-recycled materials:
→ 1 plunger (for the compression piston)
→ 1 balloon
→ tape
Price:
→ $ 14
Feedback mechanism:
→ No
Use (compression only / rescue breaths only / both)
→ both
Scientifically tested:
→ No
Tech requirements:
→ No
More information:
→ Website