Reprinted from Shomrai Shaboth - Chevrah Mishnayoth Congregation
Halachos of the Nine Days - Meat and Wine/Grape Juice
Fleishigs and wine/grape juice are forbidden in the nine days with the exception of Shabbos. Parve food cooked in a fleishig pot is permitted.
Havdala is recited on wine (or grape juice) and one may drink the kos (some have a custom to give it to a child to drink).
Children should not eat fleishigs or drink grape juice (e.g. grape juice ices) during the nine days. Although the minhag is that children under the age of chinuch do not eat fleishigs, there is room to be lenient when necessary.
On Friday afternoon, one can give children fleishigs for their evening meal even if it is before Plag.