Minni Agarwal

A fingerprint scanner uses your finger like a secret password.

Face recognition helps your phone know who you are by looking at your face.

Solar panels use sunlight to make electricity.

The black and white stripes on things you buy at shops are called a barcode.

A fitness tracker is a small gadget that you wear on your wrist, like a

Toll booths help collect money to fix roads, bridges and motorways.

An ATM (automated teller machine) is a machine that helps you take out money from

A CCTV (closed circuit television) camera is like a magic eye that watches over a

Automatic doors are common in malls, hospitals, hotels, banks and airports.

An escalator is a moving staircase that helps people go up and down between floors