Passage Summary: Some toddlers knew their numbers but couldn't remember their own phone numbers. Once their teacher turned the phone numbers into a song, the kids were able to memorize them easily.

Reasoning: The children were unable to recall a sequence of familiar items until those items were set to a musical melody.

Analysis: We are looking for a general rule that this specific story illustrates. The key transition is from failing to remember a list to succeeding once music was involved. A good principle would suggest that information is easier to retain when it is organized into a rhythmic or musical format. It’s a sweet example of how mnemonic devices help developing brains process complex strings of data.