An initative started by two grade 12's in Scotia back in 2007 and it is happening, at the very least in Ontario and BC.
Tomorrow, at some schools, is Pink T Shirt Day 2013. On that day kids are to wear pink t shirts to show that they are against bullying.
One more thing. If your four [or fourteen year old] doesn't have a pink shirt to wear he will be made to feel bad. Which is one of the definitions of bullying.
Pretty darn strange.