These are water-based paints that are activated by wetting the pans with water.
Most sets include a paint tray or palette and a brush. They commonly come in two sizes: larger 48-color studio sets and smaller 12-color travel sets.
Product details list the suggested age as 14 years and up.
Travel sets are compact. For example, one travel set measures 5.98 x 3.82 inches and includes 12 colors plus a brush in a cover.
Product details list watercolor paper and canvas as suitable surfaces and also state "Recommended Surface Application: All Materials." (The product description does not specify further surface tests.)