The Pilgrim Village Mystery (Boxcar Children #5)by Gertrude Chandler Warner

The Aldens take a trip with Grandfather to Pilgrim Village which has been built to look like an old colonial town. They love the old-fashioned candle shop, printing shop, and the general store. They even get to wear colonial costumes. Then suddenly things start to go wrong, and it seems like someone is trying to ruin the village. But why? The Boxcar Children are going to find out!