REI offers the Joules Kids' Welly Rain Boots in French Navy Stripe, Grey Blossom, or Multi Stripe for $24.83. In cart, it drops to $18.62. Opt for in-store pickup to dodge the $5.99 shipping charge. That's the lowest total price we could find by $6. They're available in sizes kid 9 to toddler 4, although not in all size/color combinations. Deal ends March 20.