Make a machine, including the end effector. Build the passive parts and operate it manually. Automate your machine. Document the group project and your individual contribution.
Measure something: add a sensor to a microcontroller board that you have designed and read it.
Design a 3D mold, machine it, and cast parts from it.
Design and make a 3D mold (~ft2), and produce a fiber composite part in it.
Propose a final project that integrates the range of units covered. Projects can be separate or joint, but need to show individual mastery of all of the skills where possible, you should make rather than buy the parts of your project.
Develop a plan for dissemination of your final project.