2 Adults + 2 Children OR 1 Adult + 3 Named Children Membership includes: - Free unlimited admission to ECHO - Free admission to 325+ museums and science centers through ASTC Passport Program - 10% discount at ECHO's ecology-themed Cafe and Gift Shop - Invitations to member-only events - Discounted member parking rates - $2 discount for all guests in your party - Early registration and discounts for ECHO programs, camps, and overnights - Subscription to ECHO Update e-newsletter