Writing and/or art competitions open to homeschoolers?

[EKT]

Hi! I'm working on my homeschool calendar for the upcoming year, trying to think of everything I want to get down. Both of my children (ages 13 and 10) have recently expressed interest in submitting their work to writing and/or art competitions this year. (Just something they want to take a stab at.) I am aware of the Scholastic Art and Writing Awards, so I've got that on my list, but if anyone knows of other competitions that homeschoolers are eligible to participate in, I would love to hear! (My hope is to identify the opportunities now, so I can track down the websites and put various due dates on my calendar so we don't miss them.) Thanks in advance for any leads!