Caillou was playing alone. In walks Rosie. Caillou ignores her, until he notices that she's wearing his favourite Teddy shirt. He throws up a fuss. After a little reasoning with his mom, his mom promised to give Rosie her ""mousie"" shirt, and Caillou gets his shirt back. He puts it on. It doesn't fit him too well (think Britney Spears ;) ). After a while, it starts to itch. He tries using tape to stick the shirt down. No dice. His mom then shows him a pix of him with his shirt, and reasons with him that he's outgrown it. But he's still reluctant to give the shirt to Rosie. Ends up giving shirt to Teddy. The end.