In the attached zip file you can read tutorials about making fun things with the low-cost ESP8266 WiFi board:
Wi-Fi module ESP8266 programming from Arduino IDE.
Switch ON/OFF light using your mobile phone over Wi-Fi.
RGB LED stripe “NeoPixels” + ESP8266 with effects switching from website.
Wi-Fi thermometer storing to Internet cloud "ThingsSpeak".
Deep-sleep mode for battery-powered Wi-Fi themometer.
Advanced thermometer with AP configuration via a website and EEPROM use.