Micrometers; Art kit for use in assembly of art installation that creates a kaleidoscope painting of moving patterns and changing colors consisting of a custom designed incandescent/LED lamp with interchangeable colored glass filtered lenses, glass crystals with custom designed sterling silver bails, plastic mounting hooks, filaments for suspending crystals, a remote control for light color and dimming preferences, micro-fiber cleaning cloths, and instructions; Calibration devices for calibrating ultrasonic testers, optical emission spectrometers; Downloadable sewing patterns; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Golf club swing aids, namely, golf club balancing scales and scale parts thereof, to analyze, fit and/or make golf clubs; Graduated rulers for measuring the planting depth of seeds, fabric for quilt patterns; Graduated rulers for quilting; Pocket calipers for measuring; Slide-rules; Solar-powered rechargeable batteries; Solar panels for the production of electricity