Pip comes to Posy's house to play, and they have a lovely time. But Pip is having so much fun that he forgets that he needs to pee.

Axel was born in Hamburg, Germany. At school he was good at art, but didn’t think of a career in illustration until he won a cuddly purple cow in a drawing competition. He moved to England in 1982 to learn English and study illustration at the Bath Academy of Art and then set up home in London. Axel illustrated a number of books for various publishers, and in 1993 Kate suggested him as the illustrator for Julia Donaldson’s first picture book text, A Squash and a Squeeze. This was the start of a hugely successful partnership: their bestselling modern classic, The Gruffalo, has sold over three-and-a-half million copies worldwide, and the TV animation was broadcast on Christmas day 2009. Axel has illustrated a number of other highly successful books, including Muddle Farm, and his books have been translated into 42 languages. Source - http://nosycrow.com/authors-etc/axel-scheffler

皮普去波西家玩，他们一会儿带玩具宝宝散步，一会儿搭积木。玩累了，他们就停下来吃东西。皮普觉得口渴，喝了很多很多水。他们玩得太尽兴啦，皮普竟然忘记去尿尿了！结果……真的好尴尬。这可怎么办呢？波西会怎样帮助皮普呢？

阿克赛尔·舍夫勒，德国著名儿童文学作家及插画作者。还记得《咕噜牛》那只聪明的小老鼠吗？小头脑里装满大智慧，就连人见人怕的大怪物都被它吓得拔腿就跑……阿克赛尔的插画既优雅又诙谐，生动灵活的图像语言充满了意在言外的幽默。阿克赛尔·舍夫勒曾与英国儿童文学作家朱莉亚·唐纳森一起，被誉为国际图画书创作领域的“梦之队”，他诸多的作品均荣获国际大奖，为全世界孩子带去了欢乐和感动。
作者所获奖项：
1999年斯马尔蒂斯儿童读物金奖
2002年英国国家图书奖最佳儿童读物提名
2003年蓝彼得儿童读物奖
2004年英国国家图书最佳儿童读物奖
2005年英国格林威大奖提名