During our calendar time today we spent a while creating number stories to go with a number sentence. We were working with 1 + 6 = 7, a basic problem for first graders. They were making up stories to go with that number sentence. Most stories were also pretty basic. One dog was eating, six more dogs came along, now seven dogs are eating. That sort of thing.
One child (a girl, not surprisingly) told this story: One unicorn was playing on a rainbow. Six more unicorns came to the rainbow. Now seven unicorns are playing on the rainbow.
That's one of the many reasons I love first grade.