FREE for Families with Sensory-Processing Differences Note: Sensory adjustments are from 9 am - 10 am but families are welcome to stay as long as they wish. All kids, teen, and adults with sensory processing differences, autism spectrum disorder or developmental disabilities are invited to experience a sensory-friendly ECHO! From 9-10 am, the museum will be closed to the general public, allowing visitors to enjoy the museum in a calm environment.