Blue versus Red

Yesterday as I took the kids to pick more raspberries before the end of the season Addie LOVED eating them.  After out first trip out to pick berries and I let her walk I learned it's best to just put her in the pack and carry her.  This time I also left her shoes IN the car so they couldn't get lost again.  As I was picking it took her a little while to figure out what I was doing but once she did she asked for "blue." I told her they weren't blueberries but raspberries.  She again said, "blue."  I asked her to say "red" which she repeated and then I said "red" again which she said.  Then I moved on to "raspberry" which she said perfectly once but most of the time came out "rap-b-b-b-ee." We went further down the row and again she says, "blue." :-)  What a goof.  She does LOVE her blueberries and now I'm wondering if she thinks all berries are called blue berries OR if she was just being silly since she laughed sometimes when I reminded her to say "red."