building
Bridges, towns, towers - hole worlds need to be constructed - and every thing about architecture, physics and other natural sciences can be explored, learned and experienced.

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Cube-mosaic
100 cubes in 20 colours.
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Counting blocks in Montessori colors
1, 2, 3... - Counting and building all in one.
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Rainbow-Window-Blocks
Glowing blocks in the colours of the rainbow