Families and adults alike will explore and learn about nature while having fun with Heller Naturalists in the outdoors. FEE IS PER PERSON. Children must be accompanied by a registered adult. Children two and under are free; please notify us at 847.433.6901 if you are bringing a young child not included in your registration. Don't forget to look in the Nature Parent/Child Programs section and the Family Camping section! Because of the fee structure we had to put them in their own groups, but they are still part of the Special Event/Heller Nature Center part of the website. Questions? Call the Heller Center at 847-433-6901. We always love to hear from our customers!