Papa taught her how to walk on the moon, just in case.

“One day, we’ll all get up there. And we’ll have to walk around just like we do here. We’ll have to go to the shops and buy loaves. And go to the bank to cash in cheques. And get to the bus stop. Except it’s different on the moon. It’s not just like here. The loaves are flat and wide. The cheques are made out in Moon Tokens. The buses are very long and have many wheels. And walking is bouncing.”

So he made her a suit filled with little pockets, alternately of air and sand, to get the balance just right. And he gave her a special snorkel with a very long hose. And he threw her into the deep end of the pool. And gradually, she learned to walk on the moon.