Harry was sitting in the playroom watching Polly play with blocks, though half of playing involved throwing them. She had stacked a couple together though. She was amused, and not throwing them at Harry, which was the important thing.
When the door opened he smiled he saw Pansy and Ella. "Hello Ella, Pansy." He said standing up to greet them. "How are you two doing?" He could tell by Pansy's face she seemed worried, and that she was trying to hide it from Ella so he refrained from asking why she was worried.
Especially since he had a feeling it had to do with Millicent. "Did you two come up here to play with Polly? She's either trying to throw all the blocks away or build a castle. I haven't really figured out which." He teased Ella with a laugh.