Bring the whole famly for a beautiful day in the Arboretum gardens and pitch in on community art projects. Piece by Piece will create mosaics for the Arboretum's Crescent Farm, with help from all! Children's Workshops > Stepping Stones. Mosaic Art Demos. Garden Mosaics for sale, created by participants of Piece by Piece workshops. Our amazing Pollinator's Paradise spheres on view!