Grimm's Building Set Cornerstones from Oskar's Wooden Ark Skip to content
We've added lots of NEW goodies!
We've added lots of NEW goodies!

Grimm's Cornerstones


The new building set cornerstones open a whole new range of possibilities. They are pretty edgy and are coming in 18 pieces and a wooden frame. It allows tricky and surprising layering variations and develops spatial thinking. This is how new and various objects in different color patterns are created over and over again. In combination with Grimm's classic building materials like the Giant Building Blocks, the Wooden Marblesthe small and large stepped pyramid, Building Boards (new item 2018) or the Cornerstones reveal their true greatness. With their aid, the most diverse marble runs can arise.

Made from precious beech wood and finished with a non-toxic water based color stain. 18 pieces in a wooden frame, 15 x 15 x 5 cm.

Recommended Age: 5+

We have added three examples (see photos) of how to built your own marble run made of Grimm's Wooden Toys. It can take some experimenting until the step height matches the ball size and the optimal distance between the cornerstones is found. Tricky building and construction for adults and playing fun even for the little ones. If everyone works together, great things can happen.

(1) Marble Run Staircase: In combination with the Large Stepped Pyramid, the Giant Building Blocks and the Building Set Cornerstones this marble run staircase was created for Wooden Balls.⠀

(2) Marble Run Bridge: This daring bridge construction for Small Wooden Marbles is a combination of the Pastel Buidling Boards the Small Stepped Pyramid, the Building Blocks - Tree Slices, the Giant Building Blocks and the Building Set Cornerstones.

(3) Marble Run Spiral: In combination with the Large Stepped Pyramid, the Giant Building Blocks and the Building Set Cornerstones was created for Wooden Marbles.

We can't wait to see all the inventors and architects out there!

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 5 reviews
Beautiful and versatile

The cornerstones were an addition to our collection for making marble runs. They have so many more uses than that, though! My kids put four together to make 'tents', stack them as high as they can for pretty towers, use their brains to figure out how to put them together in the box properly, use them in buildings they make with their toys, use them as decorations in small worlds etc. They're light and have an amazing feel, inviting children to come and play with them!

So many uses

These cornerstone blocks help take building and ball runs tot he next level. The colours are complementary to both the pastel and bright Grimm's colours. When I first received them I thought they seemed small. But in the right place the size makes sense. The box to contain them all is also really useful. Everything you'd expect :)

Nina M
Perfect Pair

We bought the cornerstones to go with our large stepped pyramid... they pair beautifully and they are everything you’d expect from Grimms 💚💙❤️💛

Love Love Love!

These are fabulous for ball runs and are quite the challenge mentally to pack away with their interesting shape!

Corner blocks

The Corner blocks are amazing, We have been enjoying making new shapes and trying to rebuild what others have made. the Colours are great with a light and Dark of each colour.