3V0204.2
3V0204.02 Robby, Miriam play with Peggy; object permanence data (8/14/78) The second group of interesting observations with the toy focus on my first observations of Peggy’s crawling. Gretchen has remarked on Peggy’s ‘falling sideways’ and thereby going forward a little over the past few days. Today;s behavior was a clear extension of what may have …