I found out during dinner tonight (which is apparently the only time that we converse as a family — at least insomuch as we can hear each other over the noise of Henry pretending to be the evil robot on the Incredibles) that it was actually Isaac who invented the Micro Penguins. He got the idea one day when he and his friends were pouring hot water on the ice on his friends’ porch. But Isaac doesn’t actually believe in the Micro Penguins, but Mabel does. She apparently also believes in Micro Polar Bears and Micro Seals and Micro Fish, etc.
Also, in case you missed the link in the comments on the last Micro Penguins post, here’s the fabulous t-shirt that our friend Anneke designed for Mabel: