Please copy and paste the Following Link in your browser to see the product demonstration. http://bit.ly/ExpansionNContractionKit Experiment and understand expansion and contraction of liquid and gas! By using all the materials provided, work on the 4 different experiments to comprehend . the expansion and contraction of liquid . the expansion and contraction of gas With step-by-step instructions provided, this is a great parent and child bonding activity. The experiments are also based on Singapore Science Syllabus at lower block level Do note that these experiments require adult supervision. Suitable for 10 years old and up. Play N Learn is the leading Educational Products Store in Singapore.