Toy building blocks consist of a base element with sidewalls, a top section, and an opening in the lower section

摘要

Toy building blocks consist of a base element (3) with side walls (5) and a top section (7), and an opening (13) in the lower section. The blocks have a connection element (9) in the form of a three-dimensional number, and the outline of each element is matched to the base element opening. The blocks are made of plastic, e.g. polypropylene.