Final answer:
The provided passage does not give information on who bought the bicycles for the children, as it only talks about children returning home from a trip and having eaten ice cream and hot dogs.
Step-by-step explanation:
The passage provided does not specify who bought the bicycles for the children. It merely discusses two characters, Wendy and Peter, who have just returned home, and their interaction with their parents. They mention being full of strawberry ice-cream and hot dogs, but there is no mention of bicycles or who might have purchased them.
Without additional context or information, it is impossible to determine who bought the bicycles. If this question refers to a specific text or story, the student would need to provide more details or review the relevant portion of the text for the answer.