It's cards but the numbers are switched out for their binary counterparts, and the face cards are switched out for their first letters ASCII value in binary.

Example:

3 → 0011

King → K → 75 → 01001011

The cards

The cards are printed .24 mm thick, making them both feel and work like practically normal cards.

Tip

If you have a larger printer use the A1 preset, so only have to print 6 beds instead of 14.

Translation table

2 → 0010

3 → 0011

4 → 0100

5 → 0101

6 → 0110

7 → 0111

8 → 1000

9 → 1001

10 → 1001

Jack(J) → 01001010

Queen(Q) → 01010001

King(K) → 01001011

Ace(A) → 1000001

Joker(j) → 01101010