Ministeck are small pebbles
Ministeck was developed in 1965 by the Helmut Guttald, the rights are since 2007 owned by the company Ministeck Creative GmbH. Ministeck are small mozaieksteentjes that are clamped on a plastic base plate. By using different colours and shapes of the small stones you can make whole works of art. Nowadays it is also possible to make your photo a ministeckpatroon so you can ministecken it after (or embroidery for example). Pixel hobby is a kind of ministeck but only has square pebbles.
[YouTube] 5mVQ3TndNrQ [/youtube]