the only qualification is that you know how to make the perfect snowball. and here is how its done.
Step 2: Second
reach your hands in and grab a little more than two handfuls.
Step 3: Third
Step 4: Fourth
the official size of an SLW snowball is in the range of 3.5 to 4.5 inches.
Step 6: Last
If you hit the person, you win. good job.