Can you build a sandcastle that can support the weight of a brick without collapsing? Watch this video to learn a neat trick that you can use to help your sandcastle support more weight. For written instructions for a science fair project using this experiment, see the Science Buddies website: https://www.sciencebuddies.org/science-fair-projects/project-ideas/CE_p031/civil-engineering/how-much-weight-can-your-sandcastle-hold. If you just want to do this as a fun activity, see: https://www.sciencebuddies.org/stem-activities/build-a-sandcastle-that-can-support-a-brick.