Archer made an exchange/Archer waved goodbye

Last night, Archer wanted to eat popcorn. Lisa covered some popcorn with her hand. Archer took a toy, shuffled it in Lisa's hand, and then went on to take the popcorn away. He was making an exchange, just like what we do to him when we want to remove something from his hand.

Archer waved goodbye to me tonight. It's for sure now that he knows how to wave goodbye.