Threepenny manikin
Slightly more advanced manikin including a spring, wooden discs, a balloon and PET bottles
Bathmat manikin
Homemade option using a bath mat, pillow and theatre mask
DIY sponge CPR manikin
Simple mechanism using sponges and PET bottles
DIY T-shirt CPR manikin
Simple DIY CPR manikin made by stuffing a T-shirt or hoodie with a PET bottle and filling materials (paper, shirts, etc.)