Non-school groups of 15–100 visitors receive 10% off admission. Request a group visit through official form; visits last 1.5–2 hours and depend on availability. Larger groups should contact 4–8 weeks ahead. Adult chaperones must be 18+: at least one per five children age 8 or younger, or one per ten age 9+. School field trips use separate pricing. Published additional ticket fees, blackouts and calendar expiry are not specified.
