Swedish Fish are awesome!  I love ’em!  Luna loves ’em too!  (when she was a toddler).  Now that she’s developed a sensitivity to Red Dye 40, we don’t give her any anymore.  It’s not worth the behavior-splosion. 
Some day she’ll grow out of it.  But for now, we check the ingredients before giving her anything red.
She’s had some bad days at school because I’ve given her a Swedish fish in the morning just to be nice.  
John Vogel