Across the available items the suggested ages include: 3 Years and Up, 4 Years and Up, 6 Years and Up, 8 Years and Up, and 12 Years and Up.
The broad-tip markers are described as washable from skin, most washable clothes, and most painted walls; reviews also cite good washability and color performance for these markers.
Many items carry CPSC choking-hazard warnings for small parts. Some kits are labeled non-toxic and state conformance with ASTM D4236.
Extras vary by kit but commonly include tie-dye accessories (rubber bands, droppers, drop cloths), storage boxes, sculpting tools and a rolling pin for clay, and gem trays, styluses and wax squares for gem art.