My dh very helpfully suggests wearing blue clothes! I might just try these with dd - she's very fickle with blueberries - sometimes loves, sometimes hates, though mostly squishes it in her mouth, takes it out and throws it, then asks for another - go figure. Along similar lines, when I was dieting, I used to freeze grapes to eat for a snack - these might go down well too, halved before freezing of course.