Three delightful, if not exactly world changing innovations.
First up, smiley face screws (complete with their own screwdriver) from Japanese designer Studio Yumakano.
All about it here.
Next, a guidelight that replaces regular power outlet cover plates, turns on/off automatically during night/daylight and costs 10c:
And lastly, a quite humorous little-door-inside-a-normal-door for the children or otherwise small people in your family:
Thanks to inewidea.com for these.