Things happen to the Banks children when they go to the park with Mary Poppins. Strange things, funny things, unexpected things: nothing is ever straightforward with Mary Poppins about - and it's never boring either! Mary Poppins, neat and prim in her blue skirt and a new hat trimmed with a crimson tulip, looked at them over her knitting. She was sitting bolt upright against the tree, with a plaid rug spread on the lawn around her. Her handbag sat...