Answer: Guests under 18 years of age will not be able to participate in shore excursions unless accompanied by a parent or responsible adult 21 years of age or older. Children's prices, where applicable, are listed on the individual tours shown for each destination featured on HollandAmerica.com. These prices generally apply to children aged 12 and under. Children 13 and over are charged full adult fares on tours. Children aged two and under may be allowed to accompany parents or guardians on some tours at no charge, though this is not typically the case with excursions that include flights, watercraft or modes of transportation other than motor coaches and taxi vans.