The Arboretum is free to walk through and look at the wonderful gardens and scultptures, but for $3 you can visit the children's garden. It's kid-sized and kid friendly. They encourage kids to get dirty and explore with all of their senses. Kathryn had such a great time being barefoot and standing in the little creek or on the misting pad. The last picture is her holding a little fishing pole [no hooks]. It was so rewarding to watch her discover new things. We will definitely be going back!