3V0216.01 Object Permanence: Miriam’s Peek a boo game with toys (8/26/78)
Miriam is playing with Peggy on the bed. She hid Peggy’s rattle (shaped like a little girl), remarking that Peggy didn’t know where it was, but that when part of the rattle showed Peggy reached and uncovered the rest. “How much was showing ? What could she see ? “The head,” Miriam replied and an instant later, Miriam and the rattle were lying together under the covers with just their heads showing. As Miriam had placed the rattle by her and drew up the covers, Peggy reached for it. She knew it was there and was interested in it. Miriam then covered the head of the rattle (as in the game of peek a boo). Peggy instantly reached over and uncovered the rattle.