This superb bumper pack of resources contains equipment and materials necessary to complete reversible and irreversible changes. Demonstrate the differences between dissolve and melt using salt to dissolve in water and wax to melt with heat. Great for hands-on scientific enquiry. 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. a Stainless Steel Mixing Bowl.