Grimm's 12 piece Natural Rainbow

The Grimm’s 12-Piece Natural Rainbow celebrates the warmth and beauty of natural wood while fostering open-ended, imaginative play. Crafted from sustainably sourced lime wood and subtly glazed with non-toxic finishes, the Natural Rainbow highlights the wood’s grain and texture, providing a rich tactile experience. With twelve curved arches, children can create bridges, tunnels, rolling hills, or sculptural landscapes limited only by their imagination.

Aligned with Waldorf educational principles, Grimm’s toys encourage creativity, sensory exploration, and independent thinking. The natural wood tones invite hands-on engagement, allowing children to connect with the material while developing fine motor skills and spatial awareness.

Unique, Handcrafted Design

Each rainbow is hand-sawn from a single slice of lime wood, giving subtle asymmetry that enhances its organic charm. Individual arches may need slight rotation to fit perfectly, a hallmark of skilled craftsmanship. Natural variations in grain, colour, and knots are expected, making each rainbow truly one-of-a-kind.

Dimensions & Materials:

• 12 pieces

• Length: 35.5–36.5 cm | Height: 17–18 cm

• Lime wood, glazed with subtle, non-toxic water-based stain

Open-Ended Play for All Ages

The Natural Rainbow provides endless opportunities for stacking, nesting, balancing, and imaginative play. Younger children can explore size, sequence, and symmetry while arranging arches, building towers, or creating small worlds. As they grow, the arches become bridges, tunnels, fences, or rolling hills. Turned on their sides, they become boats or chutes; upright arrangements inspire sculptural designs and inventive constructions. The warm wood tones emphasize tactile exploration, grounding play in a natural, sensory-rich experience.

Tips for Thoughtful Play

To encourage independent play, place the arches loose in a basket rather than assembled. This approach allows children to interact freely with each piece and explore endless construction possibilities. Recommended for ages 3+, though approved for 0+, the Natural Rainbow is celebrated by the Spielgut (Good Toy) guide for its creative and educational value.

Marble Runs and STEM Play

The Natural Rainbow is ideal for marble runs when combined with Grimm’s wooden balls. Children can create tracks, tunnels, or chutes, experimenting with angles and spacing to discover what works best. Turned upside down, the arches produce a satisfying wooden sound as the balls roll through the centre, engaging both auditory and visual senses.

This type of play promotes STEM skills, problem-solving, and perseverance. Children learn cause and effect, practice patience, and build critical thinking skills while testing and adjusting their marble tracks. The tactile quality of the arches adds an extra layer of sensory engagement, making each play session both educational and imaginative.

For UK parents and caregivers who value sustainable, thoughtful toys, the Grimm’s 12-Piece Natural Rainbow offers years of open-ended, creative play, tactile exploration, and hands-on learning, all while highlighting the beauty of natural wood.

Grimm's toys are inspired by the principles of Waldorf Steiner and are designed with the intention of helping children discover and develop their own creativity through simplicity of shapes, leaving plenty of room for independent play and imagination. Inspired by the educational philosophies of Rudolf Steiner, Grimm's puzzles, building sets, and toys are about the rainbow, happy colors, creativity, and the imagination. There are no instructions, and you can do no wrong with a Grimm's toy. Just play, learn, and enjoy. Read more in our  Grimm’s guide.

Please note: as Grimm's uses non-lacquered wood, some paint transfer can occur during play. This is considered normal. Non-lacquered wood has a lovely texture - the rough texture of the stained wood is not only an important tactile sensory experience for children, but those rough surfaces makes it possible to build in many different ways, because the parts do not slide down so easily as the wood surface is still natural and not covered with a layer of bright enamel; however if you are concerned about paint transfer we suggest you purchase another item that is lacquered to be on the safe side.