With the addition of the 12 stair elements, every building can be climbed. They complement the colorful variety of construction and play materials. Using two stair elements to make the roof line, magical little worlds with fantastic architecture can be created. 12 pieces. Material: lime wood, non-toxic water based color stainFinished with a mix of different natural oils with linseed oil as the main ingredient. This blend consists of linseed oil, olive oil, thistle oil, walnut oil and soybean oil.