Witch and whales on the broomstick

Every evening I read books to my son before going to sleep. One of his favourite is "Room on the Broom" written by Julia Donaldson. We read it in Ukrainian translation almost every night. In the Ukrainian language, the word "cat" sounds absolutely the same as the word "whale" in the Russian language. My son, who is 4 years old bilingual, can't resist playing with these two words, replacing the word "cat" on the word "whale", during all reading until the last page. And only one thing could be better if a kind witch traveled with not one whale but two. And why not? :)