A very funny observation of parenthood. George and Bella are young, carefree, like flower arranging, eating ice cream and are in love. One day a baby arrives (by post of course) George and Bella have never been happier. Then one day the baby turns into a vulture, it's cries are terrifying, particularly at night. Then the vulture turns into a baby elephant, trampling about the house, then a warthog and a bat. Some days it is a bit of each. Then the warthog turns into a Zagazoo, a long hairy teenager-ish creature, George and Bella don't know what to do, they simply can't take anymore (they've turned grey at this point) Then one morning they discover they have a perfectly nice young man living with them, he has a girlfriend and they both enjoy motorcycle maintenance. At this point there is a twist about George and Bella but you'll have to read it to find out.
We loved this book when our children were small and it caused much amusement for both children and adults. Recently our son was mending a motorbike and we both smiled.
We have a well worn copy of this but it is also available on open library.