機器
activity
appliance
arm
automation
boy
child
class
classroom
computer
concept
constructor
contemporary
device
digital
education
electronic
electronics
engineer
equipment
focus
friend
futuristic
gadget
game
girl
happy
hobby
indoor
industry
innovation
instrument
intelligence
kid
knowledge
lesson
little
mechanical
modern
play
robot
school
science
small
student
study
technology
tool
toy
use