Set sail for Thanksgiving science fun with this Pumpkin Seed Boat STEM Challenge!Students design, build, and test a mini boat that floats and carries pumpkin seeds without sinking. Through hands-on testing, they’ll explore buoyancy, gravity, density, and weight while thinking like real engineers. This printable STEM project is perfect for Grades 2–5 and includes step-by-step instructions, data tables, redesign planning pages, vocabulary review, and reflection activities — everything you need