Silent Alarm Clock What Do U Think Of These Useless Inventions?

What do u think of these useless inventions? - silent alarm clock

Useless Inventions

1. Teflon tape

2. Solar Powered Flashlight

3. A black felt pen

4. Sunglasses, glow in the dark

5. Inflatable Anchor

6. Soft Sandpaper

7. Waterproof Sponge

8. Waterproof Bags

9. AC adapter for Solar Calculator

10. Refractory Games

11. Fireproof Cigarettes

12. Battery Chargers

13. Seat belts for motorcycles

14. POWERED HAND Chainsaw

15. Inflatable Dartboard

16. Silent Alarm Clock

17. A wheel with pedals

18. Braille Drivers Manual

19. Sided Cards

20. Ejector seats for Helicopters