On Dalton (in background), argyle sweater vest ($14.50) and pique polo ($12.50; both at childrensplace.com), Tommy Hilfiger khaki pants ($29.50; at Macy's stores). On Mya, plaid taffeta tea dress with ribbon sash ($24.95; at H&M stores), Liberty of London for Target cardigan ($14.99; at Target stores).


















