Two little dickie birds

Emily had great fun with this tonight. You all probably know the rhyme-
Two little dickie birds sitting on the wall
One named Peter one named Paul
Fly away Peter
Fly away Paul
Come back Peter
Come back Paul
She got it in the end. The expression on her face when it finally clicked was priceless. "So much better that i don't tell you" I kept saying. She was so proud of herself when the penny dropped. I can remember my Dad doing the same and i couldn't figure it out either. Hopefully one day she'll be doing the same with her kids.