[Minor49er]

You've already answered your own question: the target demographic for children's drawings include the family and friends of the kid who drew them

Children's drawings are more exercises for a child to explore the media and have fun with it. Things that one looks for in visual art, such as composition, form, and general aesthetic quality, are typically not found there, and simply cannot be expected. It's going to be a hard sell for anyone: why spend $5 + shipping for a child's pencil sketch when one could spend a nickel to print any image they see online? Or a few dollars more for a large, high quality poster?

In other words, putting a price tag on children's drawings and expecting someone who isn't related to the child to buy it is going to be difficult to do. It also might set up unrealistic expectations for children and their art. It would be better for kids to trade their pictures with friends or hang them on the fridge for free

[jkurnia]

Yes, my hypothesis was that the works would be attractive because of their lack of professionalism, not in spite of it.

[Minor49er]

Why would that make the works more appealing?

[jkurnia]

Kids' art has a fresh, innocent style that can be very uplifting and is hard for an older artist to replicate.