The Hubelino puzzle Colorful Underwater World offers children aged 4 and over a creative interlocking puzzle with 35 pieces. The puzzle motifs are printed on robust, easy-to-grip blocks that are 100 percent compatible with standard building block systems. While assembling the colorful underwater motifs such as sea turtle, octopus, and colorful fish, children playfully train their hand-eye coordination and logical thinking. Thanks to the stable interlocking principle of the blocks, the puzzle pieces do not slip and stay securely in place while playing. This interlocking puzzle is manufactured directly in Germany.