Mokolock are pure wooden toy bricks. This Japanese quality product is carved out from a single piece of wood without the use of surface finishing oil, chemical, paint or glue. There are 6 kinds of Japanese wood used, each with a very distinct texture: Japanese Cherry, Maple, Birch, Japanese Zelkova, Hornbeam and Japanese Bigleaf Magnolia. All wood is harvested from sustainable forests. Block pieces in TSUMIKI are designed to be 8 times bigger compared to regular MOKULOCK pieces for young children to start learning interlocking system much easier for their small hands. 20 of 8 peaked and 8 of 4 peaked shape blocks are set in a package. An instruction book is enclosed to build figures easily, and also "Eye" stickers are enclosed to give animal figures lively look too. Package size: app. 212mm x 143mm x 51mm Block size(regular size): app. 32mm x 64mm x 25mm Block size(half size): app. 32mm x 32mm x 25mm Compatible with duplo.