Please copy and paste the Following Link in your browser to see the product demonstration. http://bit.ly/ExpansionNContractionKit Play N Learn STEM Learn and Discover Expansion and Contraction Kit helps students to visibly see and understand the concept of . the expansion of liquid . the expansion of gas . the contraction of liquid . the contraction of gas In this learning resource, a step-by-step instruction manual with illustrations is also provided. Students learn better when they are able to have a hands-on experience. The Science experiments are also based on Singapore's Ministry of Education Science Syllabus for Primary 4 students, who are mostly 10 years old. This Science kit also makes a great parent and child bonding activity. Do note that these experiments require adult supervision. Age appropriate for 10 years old and up.