A collector's edition 550-piece puzzle featuring Lake Superior rocks sounds like a delightful and engaging activity for rock enthusiasts and puzzle lovers alike! The 18" x 24" size offers a substantial and visually appealing finished product. The puzzle likely showcases the beauty and diversity of rocks found around Lake Superior, providing both entertainment and educational value. Whether it's a solo endeavor or a shared activity, assembling this puzzle could be a relaxing and rewarding experience, allowing individuals to appreciate the geological wonders of the Lake Superior region piece by piece.