Part of our 3Doodler Start STEM Series, the Science & Engineering Activity Kit will allow kids to become Engineers as they build working models of various difficulty levels. Start with the basic hydraulic claw, advance to the roller coaster model, and then challenge your expertise with the mechanical flapping wings model. This all-in-one kit comes with 3Doodler Start plastic, an Activity Guide with steps on building each model, DoodleMolds® for creating parts and components, a silicone Joint DoodleMold®, and more. Free tutorial videos for each project are available online. Get ready to construct, experiment and problem solve!