Flash cards in this household don't last long, at least it didn't use to. Why? Because little man folds them, little lady puts them in her mouth, some we lose... you get the picture. I don't want to keep buying them, even they are just from the dollar store.
I had the idea (probably not the first person who does this, but whatever... LOL) to laminate them. My husband bought a laminator at Costco (like this one) for about $22 awhile back and it came with all supplies, too.
Then I punched holes in the top left corner of each card:
And added a key ring, so we don't lose them. Ta-dah!