Binary Numbers / dichotomous sorting Set

This is a set of cards, sorting lid, and keys to teach binary numbers from 0 to 31 OR to use to teach the concept of sorting via dichotomous key with T/F, Y/N questions.

The long square keys are for True or 1 bits, the long cylindrical keys are for False or 0 bits.

Print 5 each of the T and F keys, one sorting lid, and 32 blank cards, then use diagonal cutters to cut either the square "True" or "1" or "Yes" notches, or the "False" or "0" or "No" notches, out of the upper edge of the cards.