The 2013 Beijing Maker Carnival was held in Zhongguancun International Digital Design Center recently.

Beijing Makerspace, where innovators gather to share resources and knowledge to build things, started the festival and this year's audiences enjoyed more than a dozen creative works on display.

With a portable PM2.5 detector, one can use a mobile app to check the air quality at any time. An intelligent alarm clock only stops when one gets up, and it uses ultrasound to judge whether one is in bed.

An electrical appliance links to a mobile app to remotely control devices such as televisions and air conditioners.