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
A63H33/084—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 grooves