I picked up some basic preschool flashcards at my dollar store. Shocking, they are 5 times the price at toy stores! To ensure Baby B doesn't spread these all over the house like he does his Little People and Weebles, I grabbed a few household supplies and make flashcard flippers.
I started with a few packs of the cards and then sorted them into the various stacks of similar cards (note - some boxes can actually be split up based on the content).
Just simply punch, using an oversized craft punch, a hole in the top corner of the card. Then, slip all the cards on an extra shower curtain ring. You can pick up plastic ones like this one for a few dollars for a set of 10 at any Target, Walmart, etc. I favor the metal rings, but they actually don't click tight as well as the plastic. Plus, the plastic is bigger and less of a choking hazzard!
Tied up with a cute piece of polka dot ribbon, voila! Flashcard flippers for baby B!