This kit that contains all the parts and pieces you’ll need for Introduction to Physics & Engineering, including the LEGO bricks, and the non-LEGO parts. Note: you can purchase the parts yourself using the parts list and potentially save some money, but it will take a while to track them all down. If parts are out of stock at LEGO Pick-A-Brick and you need to use BrickLink , the cost may be more than what we charge. The full kit is provided as a convenience for those who are strapped for time. If you choose to secure your own LEGO parts, make sure to purchase the Essential Kit as you will likely lose money trying to find or make those yourself.