Whenever my niece doesn't know what to call something, she just makes up a word or phrase. Sometimes the words are total gobbledegook, but sometimes you can tell where she's got it from.
For instance, a number higher than she can count (which currently means above about 12) is either "eleventeen" or "bobteen" (she's a fan of Bob the Builder).
Today my sister took the girls to the doctor's surgery to have the baby weighed. The appointment was at about 2:00, and they were home by 3:00. Talking to my niece on the phone at bedtime, I asked her if they had gone to the play park on their way home.
"Oh no," she said. "It was half past teatime, so we went straight home."