The Bauspiel Windows transparent wooden building blocks add an extra special element to play. The see-through "jewels" in the centre of each of the 5 timber blocks allows children to discover light and the myriad of effects it brings: place them on a light table for a glowing array, near a window to shine a rainbow of colours over the floor, or look through them for a kaleidoscope view of the world. 

This listing is for 5 window block pieces, one of each colour. 

Each block measures 5 x 5 x 2.5cm