If possible, get together with an English-speaking friend or relative. You can also work on your own and try to record yourself.
Have a look at the two pictures. They look similar, but there are quite a few differences, up to 8. Can you spot them?
When you have found them all or when you give up, click on the picture and you'll get instructions on how to proceed to self-correct the activity and find all the answers. Good luck and don't forget to speak English while you're playing!
H/T to DDeubel.