Let the students see you as a real person. Laugh with them. Some may remember more about you than about the subject being taught. Decorate your room. Have a mascot hanging in the room.
Teachers can easily convince students that physics is fun.
All it really takes is having the students see teachers enjoying themselves in the classroom. Some of that enjoyment will rub off on them. Assign students to working groups. Each group can work on a specific class of objects, or various different ones, at the discretion of the teacher and students. Examples of objects that students might bring to class include things like kitchen and woodworking tools which illustrate concepts related to simple and compound machines , electrical devices which can be used to explain important principles of electricity and magnetism, heating devices and insulating materials, sound producing devices, musical instruments, different types of light sources, electronic equipment, etc.