Experiments can be  used to introduce new ideas or to clarify puzzling aspects of topics with which students typically struggle. If the result of an experiment is surprising yet convincing, students are in position to build ownership of the new idea and use it to scaffold learning. In addition to checking that the conceptual focus of the experiment has been understood correctly, post-experiment assignments can push students to describe a follow-up experiment or to extend the concept to another application. At Sackhumvit we use experiments to make science learning fun and rewarding