The gems are on one side of the blocks only. The windows are translucent and you can look through them.
From Germany's Bauspiel.
This block set is large and heavy. It has to ship Canada Post into the USA as a result.
Note that due to popularity, this item is limited to one per customer. Orders with multiples will be canceled.
Measurement: Gemmed Blocks are 10 x 5 x 2.5cm, Storage box is 28.5 x 26.5 x 6 cm
Material: Alder and Acrylic
Age Recommendation: 3+ Years
Care Instructions: For care simply use soapy water with a damp cloth for cleaning. Dry immediately. Please do not submerge in water and do NOT use disinfectant or hot water.