We love this place! I would definitely recommend a membership. If you have at least 4 people in your group it easily pays for itself. I would go with the explorer package. Free planetarium shows and admissions for 6. My kids love it here because there is SO much to do and we can kill a couple hours easily with all of the stuff to check out. The shop and cafe are both nice too. My children are heavily into space and the solar system so right now like I said it's worth the membership!