. . "TECHNOLOGY & ENGINEERING / Hydraulics" . . . . . . "Experiments with a jug of water"@en . . . . . . "Miscellanea"@en . "Miscellanea" . . "Electronic books" . "Find out about liquids, solids, solutions, surface tension and changing materials. Discover how to make a hidden coin reappear and create coloured crystals. Suggested level: primary."@en . "Experiments with water"@en . "Experiments with water" . . "Juvenile works"@en . . "Juvenile works" . . .