Introduce digital cameras with built in gags or funny sounds. The gag button could be pressed before the picture is taken as a novel alternative to everyone saying 'cheese'. Camera owners could download refresher gags and noises free from the web.

Design pants with towelling pocket linings for businessmen of nervous dispositions and sweaty palms.

Install a second horn in cars. The original horn would be used for hazard warnings or to communicate anger or outrage. This would have a typically harsh sound. The second horn would be for thanking people, or saying goodbye when pulling away from friends. This horn would have a happier, more comic tone and be accordingly visually represented on the dashboard. A few road rage incidents may be avoided if drivers could differentiate more clearly between annoyance and gratefulness. A range of...