Arayla Johnson shows off her finished pumpkin chunker and prepares to give it a test at the STEM Day held for students in grades K-5. SciTEC, the HUB and the division of Curriculum, Instruction and Learning within the College of Education at Louisiana Tech collaborated to host a STEM Day that welcomed 70 students. They built straw rockets, worked with Sphero and built pumpkin chunking catapults.