How do you know when to ask for help?
Look at the videos below. They describe when you should be concerned about your child's development. Each one is less than 2 minutes. (Click on the underlined links to open the video in a new tab on your screen.)
Top warning signs in general:
http://www.howcast.com/videos/513300-signs-child-is-developmentally-delayed-child-development/
Age 2:
https://www.youtube.com/watch?v=kNRxxXA1jtc
Age 3:
http://www.howcast.com/videos/513280-signs-of-developmental-delay-at-age-3-child-development/
Age 4:
http://www.howcast.com/videos/513286-signs-of-developmental-delay-at-age-4-child-development/
Age 5:
http://www.howcast.com/videos/513292-signs-of-developmental-delay-at-age-5-child-development/
Age 6 or 7:
http://www.howcast.com/videos/513298-age-6-age-7-developmental-delay-signs-child-development/
Source: Shirael Pollack, Watch Me Grow