Buying for a tween is its own sport. Too young feels babyish. Too old feels wrong. And whatever was cool three months ago might already be irrelevant. Whether you're shopping for a 10, 11, 12, or 13 year old — a daughter, a niece, a best friend's kid — this list is what tween girls are actually a...

You got the invite. Now comes the real question: what do you actually wear? Mitzvahs have two very different vibes — the synagogue service in the morning, and the party at night. The dress code shifts between them, and getting it wrong in either direction (too casual, too revealing, too much like...