sparkles are happy. Sparkles make everything pretty. Sparkles can sometimes make you go blind. Everyone needs a chance to sparkle.
See some sparkles!
shine is when you just can't get any shinier. Shiny things are fun to look at because OMG SHINY. They can also be very distracting. People who shine are made of metal.
glow...damn. It's like you have a super bright light inside you, radiating out through your skin. People who glow are magical because they are truly happy. One should aspire to glow.
Some glow worms