Step 4: Create a digital time capsule. There are many 21st century tools available for creating products in an online environment. Use the Web 2.0 tool of your choice to create a digital time capsule explaining why your chosen advances were the most important. Be sure to explain who was responsible for these advances and how they affected 20th century life. To learn more about Web 2.0 tools and for help locating a tool, visit the Web 2.0 tools area. Your time capsule must: have one slide for each example that includes a two to three sentence explanation of why the advancement was important have one image on each of the five example slides that represents the impact of the advancement have one final slide that includes a one paragraph justification of the order in which you placed your images