A great list of toddler and preschooler books relating to the theme of Body Parts the PUBYAC listserv is pasted below. I have it here since many would work well for a storytime! Be sure to add songs like “Head and Shoulders”, “Where is Thumbkin?” and “The Hokey Pokey.” 
For a Craft project, I would do something simple like having the children trace their hands, or make paper plate masks of their own faces, or if you have big rolls of paper and some time, adults can trace the children’s whole bodies, as they lie on their backs on the paper.
Books to Help Young Children Identify Parts of the Body (“This is your eye, this is your nose” etc. ” not necessarily about “bodily functions”):
- Agassi, Martone – Hands Are Not for Hitting
- Aigner, Julie – Baby da Vinci: My Body
- Aigner, Julie – Mirror Me!
- Aliki – My Feet
- Aliki – My Five Senses
- Aliki – My Hands
- Arnold, Tedd – Parts
- Arnold, Tedd – More Parts
- Avison, Brigid – I Wonder Why I Blink and Other Questions about My Body
- Ball, Jacqueline A. – Riddles About our Bodies
- Bauer, Marion Dane – Toes, Ears and Nose – aLift-the-Flap Boo
- Bender, Lionel – The Body
- Boynton, Sandra – The Going-to-Bed Book
- Boynton, Sandra – Horns to Toes and in Between
- Butler, John – Whose Nose and Toes?
- Carle, Eric – From Head to Toe (various animals)
- Caviezel, Gionvanni – My Own Human Body
- Cole, Joanna – The Magic School Bus: Inside the Human Body
- Dorling Kindersly pub – Busy Little Bodies
- Emberley, Ed – Go Away, Big Green Monster
- Graham, Nick – The Human Body Action Book
- Graves, Keith – Frank was a Monster who Wanted to Dance
- Hands-on Crafts for Kids – How Do You Move?
- Hindely, Judy – Eyes, Nose, Fingers and Toes
- Heller, Ruth – Chickens Aren’t the Only Ones
- Holden, Arianne – Body (Playschool series)
- Holden, Arianne – My Body (Fun to Learn series)
- Greenway, Shirley – Legs and All
- Greenway, Shirley – A Tale of Tails
- Kates, Bobbi Jane – We’re Different, We’re the Same
- Katz, Karen – Baby’s Box of Fun: Where is Baby’s Mommy? Where is Baby’s Toes,Ears and Nose?
- Leuck, Laura – My Baby Brother has ten Tiny Toes
- Manning, Mick – My Body, Your Body
- Markle, Sandra – Outside & Inside You
- Martin, Bill – Here are my Hands
- Miller, Margaret – Baby Faces
- Miller, Margaret – Look Baby What’s On My Head?
- Martin, David – We’ve all got Bellybuttons!
- Morgenstern, Constance – Good Night, Feet
- Parker, Steve – The Body & how it Works – Human Body
- Parrott, Leslie – God Made You Nose to Toes
- Rockwell, Anne – Head to Toe (various animals)
- Rockwell, Lizzy – Busy Body Book
- Rosa-Mendoza, Gladys – My Body
- Rosoff, Iris – My First Body Book (DK Pub)
- Rosen, Michael – Freckly Feet & Itchy Knees
- Rotner, Shelley – The Body Book
- Rotner, Shelley – Faces
- Schaefer, Lola – Body Pairs
- Schaefer, Lola M. – It’s my Body ABC
- Serfozo, Mary – A Head is for Hats
- Smith, Patty – Faces
- Solar, Kay – Where Do Babies Come From?
- Suter, Kathy – Baby Faces
- Sweeney, Joan – Me & my Amazing Body
- Tuxworth, Nicola – A first book about bodies
- Verdick, Elizabeth – Feet Are Not for Kicking
- Walker, Richard – The Kingfisher First Human Body Encyclopedia
- Walsh, Melanie – My Nose – Your Nose
- Weeks, Sarah – Happy Birthday, Frankie
- Wiese, Jim – Head to toe Science: Over 40 eye-popping, spine- tingling…
- Wilkes, Angela – My Body
- Yektai, Niki – Crazy Clothes