Head over to Time for Hugs and get the full-resolution version of this poster. (Creator Scott Markley is emailing out files since he can't sell the copyrighted images.) Print it out and hang it on a child's wall. Drill them on it every day. That is all.
Sure, you could teach your preschooler the alphabet using boring animals and fruit. But why bother when the Geek Alphabet will help your toddler understand the wonders of the occipital lobe, gaming, cosplay, and the the Uncertainty Principle?