There are exists many kind of elves such as wood elves, high elves, and dark elves. A lesser known faction of elves are the epoch elves. Epoch elves are hard workers and fantastic engineers. They are designing, constructing, and assembling and toys as well as presents for their local AI Santa Overlord one epoch after the other.
Already at very young ages those elves are trained epoch after epoch to master their skill and are engaged in the Santa's workforce. Child work is not forbidden under Santa's Dominance. Epoch elves work literally without any breaks and no salary.