I cut out six tracings of Emma's hand and six of Johnny's hand. Then Emma told me what to write on each hand. I was having a hard time explaining the terms thankful and grateful to her, so we settled on things she and Johnny like. Things Johnny liked went on Johnny's hands; those Emma liked went on her hands. 
Here's what Emma came up with:
Johnny's handprints:
- Emma
 - Dada
 - Mama
 - Milk
 - Baby food
 - Cuddles
 
Emma's handprints:
- Johnny
 - Dada
 - Mama
 - Trees and the leaves that fall down
 - Emma's food
 - Mama's ring