Would You Ever Dye Your Child's Hair?

Not that I think celebrity parent's always make the best decisions, but Gwen Stefani does seem like a pretty awesome mom to me. She's always photographed spending QT with her boys and she's said they come before her career.

But I'm wondering about her decision to dye her son Kingston's hair. I thought it was naturally blonde like her younger son, Zuma's, but now I'm not so sure. Here's a pic of Kingston with dark brown locks:

And here's a more recent pic of him with noticeably lighter locks:

Just wondering if any other moms out there have dyed their child's hair? If so, why? And is it safe?