Grimm's Large Natural Tunnel 12 pieces from Oskar's Wooden Ark Skip to content
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We are currently moving warehouses - orders placed during our move will receive a surprise - shipping will resume from 11th May

Grimm's Rainbow Natural Tunnel Large 12 pieces


Grimm's Large Natural Tunnel from Oskar's Wooden Ark is absolutely versatile and an ideal toy even for the smallest child. Toddlers can stack, sort and build and children can use it as a cradle for dolls, as a fence for animals, or a tunnel, as a bridge for vehicles, a house for dwarfs and dolls. The possibilities with the world famous Grimm's Rainbows are endless and it is by far the most open-ended toy available. It will always be a toy that integrates play with the use of imagination and fantasy. 

In addition to the fact that it is not only a versatile toy but it also looks like a piece of art. It is a guaranteed eye-catcher in every house that will last for generations.

Made from precious alder and finished with a non-toxic plant based oil finish. 12 pieces. Size: length 38cm, height 18cm.

Recommended age 3+ years.

Grimm's world famous large Tunnels and Rainbows from Oskar's Wooden Ark are available in different colours and size options. For a better overview, we have listed them here for you: Grimm's Rainbow World by Oskar's Wooden Ark.

Grimm’s Spiel & Holz Design from the Swabian Alp is one of the most outstanding German wooden toy manufacturers. As a family-owned company they develop, manufacture and sell wooden toys since 1978. Grimm’s intend is to design toys, whose simple and reduced design together with beautiful colouring, and inviting surface feel are well suited for all ages - products that are played with over and over again.

Committed to the pedagogical guidelines of Montessori and Waldorf pedagogy, Grimm’s offer open-ended toys made of sustainable sourced wood for both children and adults. Their natural toys are not only well renowned in Europe and used extensively in many kindergartens and by speech and occupational therapists to improve and extend general didactics, fine motor skills and mathematical reasoning.

Customer Reviews

Based on 20 reviews

I don’t know where to start with the natural rainbow. But I’ll start off with saying how beautifully made it is, the quality is amazing and other cheap ones you might find, would come no where near how amazing this is.
It’s sturdy, fits perfectly together so the children don’t get frustrated. It stacks so well and is very inviting/ aesthetically pleasing.
There are SO many open-ended, different creative ideas you can come up with. Theirs a link so you can find different things to do/ build with it.
It’s paired perfectly with many things from OWA, but in particular, the coloured semi circles.
My 15month old son LOVES it and my older FDC children, ages 3-4 were busy building for hours!
We still have so many things we can do with it as well!!

Open ended and wonderfully made

We love our natural rainbow! It is so hardy and can endure all sorts of play with my three year old. So glad I decided on this as my first purchase at OWA

Grimm's Large Natural Tunnel 12 pieces

Kids and I loved our new addition to our Grimm’s collection. I love the quality the smell and the texture of the wood, also gives us endless possibilities of play in combination with other stacking pieces 💚💜💛

Rainbow magick

First Grimms purchase and we are so happy ! wood is so special and natural curves are so beautiful to play with they possibilities are endless, we have made so many interesting things so far. Like this giant croissant :). The way they hold onto each other is truly amazing!! Thank you for such a lovely package and note. A lovely experience <3

Amazing product

We have purchased this product for our preschool room at an early learning service. The children absolutely love it! It is open ended and allows them to be creative and use their imagination. Not to mention it looks beautiful on the shelf!


The quality of this wood is amazing. The coating allows the wood to be stacked with ease. Multiple ways to engage in open ended play

Large rainbow

This has been a wonderful add to our collection. We love the quality and endless open opportunities to be used so much in creative and imaginative play.