Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Electronic collars to train animals; Eye glasses; Fire resistant gloves; Laser rangefinders; Magnets; Measuring tapes; pH meters; Scales; Scientific instrumentation for measuring concentrations of chemicals in water; Scientific measuring instruments, namely, conductivity meters; Slide calipers; Sound level meters; Timers; Tool measuring instruments; Water testing instrumentation fo...