Bring Valentine’s Day excitement to your STEM block with Candy Heart Bridge Builders, a hands-on engineering challenge your K–2 students will beg to do again. In this sweet (but serious) design mission, students become real engineers as they plan, build, test, and improve a bridge using simple classroom-friendly materials. The best part: you get big learning with minimal prep, and kids stay locked in because they’re building something that actually matters to them. Students start with a quick