Ios - Kids Birkis Ios - Kids Never worry about your kids losing their sandals with this heel strap style. They'll be comfy all day in the cork footbed and will get proper support for their arch development. Tuvalu - Kids Birkis Tuvalu - Kids Running around and playing are safe in these ankle strap sandals. Two adjustable straps allow for maximum fit. The cork footbed provides good support for growing feet.