Apparently, the Zack Nelson bracelets come in two colors--black and pink for girls, black and green for guys. And I believe the green ones are also sized a little bit bigger.
Again, if anyone is interested, I can help you out. They're $5 and are going to The Nelson Foundation to raise awareness against distracted driving.
Meanwhile, Trish Nelson has been doing some related speaking arrangements at schools and there have been various other commemorations in his memory.
Drive safe, kids.