関連ワード:  at what age can a child count to twenty    at what age do kids count to twenty    at what age can kids count to 20    at what age should kids count to 20    at what age can toddlers count to 20    at what age can babies count to 20    what age can.most kids count to 20    at what age do kids start counting to 20    at what age do kids learn to count to 20    at what age can a child count backwards from 20