Does anyone know how to make your own Glen Doman Flash cards?

Brillkids.com has flashcard pdf files that you can print out. Don't think they're original Glenn Doman cards but according to the site it is inspired by the Glenn Doman method of teaching children by showing them flashcards everyday. You will need an Adobe Reader to download and print these cards. Here's the link: http://www.brillkids.com/free-download/flash-card-printouts.php