Seeds of Change in Anchorage is a worthwhile day trip, ideal for kids in 3rd - 12th. It is an indoor hydroponic farm that is maintained, under supervision, by Anchorage youth.
Year-round, but especially in winter, this place is a haven of lush greens, herbs, and veggies grown using state-of-the-art methods that are then sold locally. Proceeds benefit Anchorage Community Mental Health Services
They offer free tours an even a little quiz (and often a free bag of produce!) at the end. Find more information here, and use this contact form to ask about setting up a visit.