All the letters of the alphabet in a pure linen sack. There are also the numbers 0-9. The young one can stack them, count them, learn the letters and spell their first word.
They are made of solid wood and are not treated. Their colour can vary a bit along with the natural colour variation of solid wood.
Blocks: 5.5 cm x 5.5 cm x 5.5 cm (each)
Sack: 32 cm x 32 cm
The blocks are made of solid wood without any treatment. You can remove general grime by wiping the blocks with a damp cloth.