"The Molecular Workbench™ (MW) is a free, open-source tool that creates and delivers visual, interactive simulations for teaching and learning science and engineering."
At Lego City you can create a comic strip that feature Lego elements. To create a comic just select a strip format (one box or multiple boxes in various layouts) and start dragging elements into your comic strip. Elements in your comic strip can be resized to fit the frame and maintain proportions among multiple elements. Your comic strip can have multiple pages. When you're done creating your comic strip you can save it online or download it to your computer. Kids do not need to login to create a comic.