Lemelson Center’s Invention at Play is a website that encourages creative thinking. The philosophy is that, by playing, we become more inventive. Cloud Dreamer allows the students to use their imaginations to create their own visions in the clouds. Puzzle Blocks emphasizes problem-solving with tangram pieces. In Word Play the students create stories. By far, one of the favorite playgrounds among my students is Tinker Ball. This is basically a web version of the Bubble Ball app I posted about not too long ago. The students have to use various pieces in combination to get a ball into a cup. It’s fun to challenge them to find out who can do it successfully with the least pieces or the most. I love that they are problem-solving, but that there endless solutions to the problem. You could have them write a “How To” paper giving instructions, or get them to think about their own thinking and describe the process they followed to reach their final solution.