The Mystery of the Clicking Glass Tube: Identifying Those Vintage “Clicker” Toys and the Soothing Nostalgia They Bring

of a “Newton’s Cradle” or vial-style spirit levels, the specific configuration—a completely sealed glass tube with exactly two or three small metal balls inside—points strongly to a much more charming and nostalgic truth.

Let’s explore the fascinating history of these little glass tubes, separate the scientific myths from the vintage reality, and discover continue reading …