[T9-L4] Check your memory!

to decide how something will look, work, etc., by drawing plans, making computer models, etc.

a small electronic machine, like a smartphone or tablet

What are they made of ?

make a machine do something

Show an image or light on a screen, desk, or wall.

Thing we do when our phone is out of battery

the board with a set of keys on a computer, etc. to type information or that you use in order to make it work:

without wires