Can it be used for beech wooden chopping boards? Is it bad for your health? Is it safe for children or toys?‍

Any of the products that are marked food safe are okay for this use. Please refer to the applications section where it has more details on which products are good for this purpose. In general anything that doesn't have VOCs and other things added is good. This includes Raw Linseed Oil, Tung Oil, Mineral Oil and the Waxes