I tried searching and even had Claude search in modern Greek and didn't find specifically cards with objects shaped like the letters.
replyCan you share what you found?
Search for Greek Flashcards.
replyJust did and still not seeing exactly what OP has made where the object looks like the letter. There are a few where the letters are abused to vaguely look like (use same texture) objects.
replyMaybe my Google foo sucks but could someone actually link what they're seeing?