This superb bumper pack of resources contains equipment and materials necessary to complete reversible and irreversible changes – for example with Plaster of Paris, coal and night lights. Demonstrate the differences between dissolve and melt using salt to dissolve in water and wax to melt with heat. Contents include: Plaster of Paris 5kg, Iron Filings 500g, Wax 500g, Salt 1kg, Coal 500g, 6 Candles, 30 Night Lights, 10 Night Light Stands, 100 x Economy Test Tubes Rimmed 10 x75, 1 Test Tube Rack, 10 x 100cm Glass Beakers, 10 Glass Stirrers, 5 -10 – 110°C School Thermometers, Pestle and Mortar, 1,000 Wooden Splints, 25 Metal Dishes and a Stainless Steel Mixing Bowl.