This article presents a simple design challenge, based on the PBS program "Design Squad's" "Watercraft" activity that will prove engaging to most technology and engineering students. In this floating boat challenge, students are to build a boat that can float and support 25 pennies for at least 10 seconds--without leaking, sinking, or tipping over. Based on the enthusiasm that this challenge generated, the authors are planning to organize an after-school "inventors club" for interested students. They will start with brainstorming design challenges to stimulate outside-the-box thinking, then will progress so that interested students can take their raw ideas and learn how to transform them into plans, keep an inventor's notebook, and perhaps mock-up some prototypes. (Contains 6 photos.)