3V1010.01 Playing with coins: progressive discrimination (10/26/80)
After P143 (where we played with many coins) Peggy found the pile of
change and asked me to join her in playing with them on the floor. As
we did so, Peggy separated them and said, “I’m picking the big pennies
out and putting them on the floor.” This is significant as showing
Peggy’s primary classification of the coins is based on size — further
that the discrimination proceeds by qualification of the THING before
discriminating different kinds of things.