Ice Cream has lost it’s value

Today I was in a hurry to get lunch on the table so I could get my 4 year old to gymnastics on time.  In my haste, I forgot to take the peal off my daughter’s pear before giving it to her.   I said to my 4 year old, “Eat the pear with the peal on it or you don’t get your ice cream tonight.” She replied “Yeah it’s not worth it to me. I won’t have ice cream tonight.”   

Time to find a new currency that works for her.   What works best for you and your kids?