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.
peg dolls - a cute addition for celebration ring
Peg dolls that can straddle cardboard vehicles/animals
Easy DIY Doll Bed Sewing Pattern for Kids
Princess peg dolls 5pc Set by PegHeads on Etsy
Star Trek Peg Doll Set from Wooden Leg Named Smith
wooden bus and eleven hand-painted wooden peg dolls.
wooden peg people
Simple hand painted peg dolls at LansdowneLife.com- to make for E in another year or two
High School Science With Mrs. Lau: Hands-on Biochemistry: Beads, Pipe Cleaners, and the clearest way to teach monomers and polymers!