Prototyping is a critical step in bringing ideas to life and often involves a 3D printer. STEM/STEAM labs are regularly reconfigured to suit a range of activities and grade levels. This cart's sturdy frame and casters protect your investment and makes it easy to move to the point of instruction while keeping everything you need close at hand. This model comes with Tub Pack 1 which includes 4 Large Open Tubs and 1 Really Big Tub.