General grime can be removed by wiping the blocks with a damp cloth. As the wood is untreated, food or paint stains could be difficult to remove.
The flax linen bag, however, can be machine washed.
Made of untreated wood (Colours may vary)
Blocks: 5.5cm x 5.5cm x 5.5cm (each)
Bag: 32cm x 32cm