To participate in the month-long hubs, children must be 7 to 15-years-old on the day the hub begins. To remain fair to all families, we do not offer flexibility with these requirements. Children of all ages are invited to participate in Thursday Field Trips. Children under the age of 3 are free, and children 3 to 6 pay to join their older siblings. Any child under the age of 7 who joins Thursday Field Trips must attend with a paying adult. Prices for these opportunities are shown on each country page: Guatemala, Peru, Mexico.