Our Materials

Our design philosophy and the materials we love.

We make watercolor kits and craft toys for children. That means our materials end up in small hands, on kitchen tables, and eventually in the world. We made our choice early: reduce plastic use and lean on natural materials and sustainable packaging wherever possible.

Materials we build with

We reduce plastic. We choose natural materials and sustainable packaging wherever we can.

COI Play material collection: bamboo, tinplate, raw wood, acrylic sheet, watercolor paper, leather, natural threads, natural rubber, canvas cotton, and recycled polyester
  • Bamboo for pencil sharpeners and brush handles.
  • Tinplate for reusable boxes.
  • Watercolor paper from FSC-managed forests.
  • No plastic fillers, foam peanuts, or oversized packaging hiding small things.

Inside our watercolor pans

Our 18-color palettes are made in the spirit of traditional watercolor: natural plant resins, mineral clays, and earth-derived pigments. Modern science steps in where it makes the paint safer for a child's brush.

Peach gum resin on the bark of a peach tree, one of the natural plant gums used in COI Play watercolor binder research Watercolor paint ingredients used in COI Play palettes, including peach gum, mineral pigments, earth minerals, kaolin clay, calcium carbonate, titanium dioxide, talc, mica, strontium aluminate, and water

Full Safety Data Sheets are available to retail partners on request.

See how our paint-on-paper watercolor works.

Responsible sourcing

COI Play uses FSC-certified paper components where possible and continues to move packaging toward reusable, recyclable, and lower-waste formats.

Read more about how we design without waste.