This morning my four-year-old son and I were watching lizbee's latest Old Skool Doctor Who vid, which celebrates the dubious charms of "The Horns of Nimon" (with bonus pants-ripping action!). Simon is a sensitive little soul and easily frightened by monsters as a rule, but as soon as he saw his first Nimon he fell in love. "I like that guy!" he chirped. "I'm him! Mommy, can I have some paper and a pen?"
A couple of minutes later he proudly presented this, his very first piece of fanart:
As I said in the comments of Liz's post, I think this proves that the Nimon pretty much fail at scariness.