They can also be used as flashcards for studying.
SEETOOOGAMES Blank Playing Cards to Write on - 216pcs Poker Size Game Cards : Toys & Games
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224 Blank Custom Cards for DIY Game Cards, Gift Cards, Checkered Diamond Backing (4 Decks, 3 x 4 In)
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Count: 180 Blank Printable Playing Cards to write on Sturdy Cardstock: High quality 310 gsm (16pt.) card stock and rounded corners Multiple DIY Uses
LotFancy Blank Playing Cards, 180PCS White Blank Index Flash Cards to Write on, Printable, Study Learning Cards, DIY Gift Card, Game Cards, Matte