Theodore Roosevelt second graders spent part of St. Patrick’s Day developing their critical thinking and problem-solving skills when they participated in the Leprechaun Zip Line Challenge. Students designed and constructed a carrier that could travel from the top of a zipline where a rainbow was pictured to the bottom of the zipline where a pot of gold was located. Using items such as a paper cup, pipe cleaners, a paper clip, tape, a Leprechaun sticker and some small, plastic “cargo” pieces to place in the cup, students tested and retested their carriers until they successfully traveled down the zipline. Students drew their designs on a worksheet and recorded their observations as their carriers went down the zipline. The STEM activity was led by science and technology teacher Ms. Regina D’Orio.