Learning about body parts can be fun and educational for children. 

There are many books, games, puzzle cards, skeletons and other plastic models (where the body parts can be removed, observed, and arranged back into their correct position) that can help your child to learn about his/her body.

There are also many educational body parts songs that they could sing.

Try these for example: 

"Head, Shoulders, Knees & Toes"

(Touch Body Parts as You Sing)
Head, Shoulders, Knees and Toes, Knees and Toes,
Head, Shoulders, Knees and Toes
Eyes, Ears, Mouth and Nose
Head, Shoulders, Knees and Toes

"Me Complete"

I have ten little fingers and ten little toes
Two little arms and one little nose,
One little mouth and two little ears,
Two little eyes for smiles and tears,
One little head and two little feet,
One little chin, that's me complete

"Brush Your Teeth"

This is the way we brush our teeth, brush our teeth, brush our teeth
This is the way we brush our teeth, so early in the morning.
Brush them up and brush them down, in little circles or round and round
Don't brush them from side to side, for those sugar bugs will surely hide.