Kamik Shadow Boot
Here's what other sites are saying:
Gear your child up in one of the most seriously hardy kids snow boots available. The Kamik Kids Shadow Boot provides warmth and protection all the way down to -40F (-40C), with a good dose of durability thrown in. Waterproof nylon uppers and rubber treaded outsoles keep snow and rain out, while the moisture wicking lining and insulating Zylex liners keep things toasty and dry inside. Just cinch the top collar and adjust the ankle strap for good support, and let your child indulge in an extra-long day of play in the snow.