100 mL Glass Beaker

Demonstrates Charles's Law by showing gas volume changes with temperature at constant pressure. Warming the bulb with your hands expands the trapped air, pushing water down the stem; cooling with …

Water rises to different heights in a set of glass tubes with increasing diameters, directly showing the inverse relationship between capillary rise and tube radius.

Demonstrates refraction at a flat water-air interface. A coin hidden below the rim of a cup becomes visible when water is added, showing how Snell's law causes objects to appear …

A toy water rocket demonstrates rocket propulsion via conservation of momentum. Pressurized air expels water downward; the rocket accelerates upward — a dramatic, memorable example of Newton's Third Law.