def aquariumTicket(total=0):
    adult_price = 26.00
    child_price = 19.50
    senior_price = 21.50
    baby_price = 0.00
    age = input("What is your age? ")
    if age < 3:
        print "Ticket price: $%.2f" % baby_price
        return aquariumTicket(total + baby_price)
    elif age <= 12 and age >= 3:
        print "Ticket price: $%.2f" % child_price
        return aquariumTicket(total + child_price)
    elif age > 12 and age < 55:
        print "Ticket price: $%.2f" % adult_price
        return aquariumTicket(total + adult_price)
    elif age >= 55:
        print "Ticket price: $%.2f" % senior_price
        return aquariumTicket(total + senior_price)