This design is targeted toward young children (5-10) because it has a humorous cartoony image and uses bright colors. It would also be popular amongst older people with a more eclectic style because i wouldn't be surprised if few children knew what deviled eggs were.
This design is targeted to older children ages 10-14 because the humor is something you wouldn't likely learn until you have seen it in a math class, probably in 4th or 5th grade. The cartoony style appeals to children with brights colors while also staying simple. People who have interests in math would most appeal to this design.