Last night I was brushing Margaret's hair with the pooh-bear hair brush. Max decided he wanted to play with that hairbrush, but Margaret had it in her hands. I offered him the green hairbrush. He didn't want it. But then he reconsidered. He took the green hair brush from me. And then he offered it to Margaret and said "trade, baby" and she gave him the pooh-bear hair brush! Smart boy Max!!!
Once he figured this technique out, he was happy to use it later in the evening. Unfortunately for Max, Margaret is a little more discerning. She had a book. He wanted the book. He offered her the Lambchop toy. She wasn't about to trade for that. So he offered up the toy blackberry. That was a worthwhile trade. :)