Ray box, simple, safe and sturdy source of projected light for many classic optics experiments, produces parallel convergent rays across a plane horizontal surface and the rays are intense enough to be traced in natural light. Built in solid aluminum extrusion casing, 100-240V 50/60 Hz
Harmonic Motion Spring, ideal for demonstrations or hands on experiments in the physics classroom, 7 inches (18 cm) long with a maximum diameter of 1.4 inches (3.5 cm) and a spring constant (k) of 9.6 N/m
Food Poisoning Kit II PCR technizue, Includes: Sample A, B, C and Unknown DNA (60 uL for each DNA) Good for 24 students with 6 reactions, 270ul 2X PCR Master Mix (includes primers and enzyme), 30ul ddH2O, 30ul DNA Ladder. To identify food-borne illness-causing microbe
Squishy Circuits Group Kit, perfect for classrooms, makerspaces, 10 Battery Holders (40 AA Batteries not Included), 10 - Piezoelectric Buzzers, 10 Motors with Fan Blades, 10 Switches, 80 LEDs 10 ea in Red, Green, White, Yellow, Orange, Purple, Blue