Form groups. List a few articles of everyday use. Discuss how they can be improved.

1. Doorbell: The doorbell that everyone has in their homes can only be clearly heard in one room. In order to improve the doorbell, we can install the doorbell device in the other rooms too.

2. Mosquito racket: Mosquitoes are the worst nuisance for man. The rackets work pretty well, but it would be better if we had a bigger net to easily capture the sly mosquitoes.

3. Mobile phones: Even though the mobile phone is owned by almost everyone, its battery life is pretty less, so it would be feasible if the battery life sustains for a longer time.