Simply post a picture that features a number. The next post has a picture of the next number in order.
I will start with ZERO! The next poster will be 1. The following poster will be 2, etc. Even in the hundreds or possibly thousands we can still find pics online of the number. Just do a google search of that number with the "pictures" tab and you'll find something. Jersey numbers, highway/interstate signs/radio station numbers, etc.
Here's my local hero, Damian Lillard with the ZERO.
Next up with the number 1!