A punch card generator for quantum computers (hypothetical). Comparison of bit and qubit.
Practical thinking about interfaces for qubits starting from the idea that logic or computation by qubits can be understood with 3D vectors.

Manual: The left orb represents a bit. “State” controllable by clicking on it. The right sphere represents a qubit. “State” controllable in 3D space by drag’n’drop (x- and y-axis) and mouse wheel (z-axis) via the inner sphere.
Small orbs toggle punch card printing.