ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,519, issued on March 25.
"Multifunctional toy for early childhood education" was invented by Zhanheng Ye (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multifunctional toy for early childhood education comprises a plurality of basic elements and at least one expansion element, wherein the basic element has a rollable outer surface and an inner cavity for sleeving other basic elements, and a connector is arranged between at least two basic elements, and the connector is installed between the two basic elements in a mutually matched manner; and a plurality of steps are detachably connected on the connector, and the expansion elemen...