Child Labor in Burgundy back in 1727?

A 1727 English text about winemaking in Burgundy reveals how French winemakers simultaneously reduced their labor and day-care costs, by “putting little Children into the Tubs to tread the Grapes to Pieces, who by running about in these large Tubs, as the Grapes are throwing in, tread them under their Feet, which more effectually bruises and heats them, than ’tis possible to do by beating with Sticks or Battoons.” Is that really child labor? It sounds like a lot of fun!