A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
A63H33/00—Other toys
A63H33/04—Building blocks, strips, or similar building parts
A63H33/06—Building blocks, strips, or similar building parts to be assembled without the use of additional elements
A63H33/08—Building blocks, strips, or similar building parts to be assembled without the use of additional elements provided with complementary holes, grooves, or protuberances, e.g. dovetails
A63H33/082—Building blocks, strips, or similar building parts to be assembled without the use of additional elements provided with complementary holes, grooves, or protuberances, e.g. dovetails with dovetails
Process for preparing N,N'-disubstituted p-quinondiimines, their use and methacryloxy- or acryloxy groups containing organosilanes and process for stabilizing them and their preparation