Playing Cards make the perfect ambigram product since you already view them from 2 perspectives. In fact, the pictures on the face of the Jack, Queen and King have always been ambigrams (look closely). Of course, the front of every card in the deck is rotationally symmetric.
Now, you can have an ambigram on the back of every card as well.
Your ambigram design will really pop in a super high resolution white foreground against a subtle blue gradient background. This is a standard sized poker deck, including 2 jokers (54 cards total). Comes in its own plastic gift case. Arrives in 14 to 32 days from date of order. Imported. Measures 2.5" x 3.5".