We're going to design a poster about prime numbers, which will appear in a mathematics magazine for middle school students.
The poster should be both visually attractive and mathematically rich.
Do you have any suggestion for the content or idea of the poster?
Update: Finally! Thanks to the ideas offered here, a poster (based on the sieve of Eratosthenes) was designed and printed as the cover of our magazine. The numbers below the sieve are $4, 6, 8, 9, 10, 12$. The numbers inside the sieve are $ 2, 3, 5, 7, 11$. The number above the sieve is $1$.