I came across this cute DIY last weekend. It's from Beachbrights.blogspot....and I think it's so creative and fun for any age.
All you'll need_
she cut them straight down the back...
Added the grommets. Not too difficult, really.
When you get to this site search "Wellies" and full instrutions will pop up! Simple.
A little DIY project to put in your back pocket.