There is a great series of videos for teaching sign language to kids called "Signing Time". Each video introduces about 10-20 words through cartoons, catchy songs and videos of real kids. Our library carried most of the videos, but I think you can even stream them from amazon now. (
https://www.amazon.com/Signing-Time-First-Signs-DVD/dp/B000R3441G)
Our family probably learned at least a hundred signs by the time our daughter started talking. She enjoyed watching the videos, of course, but her increased ability to communicate was wonderful and significantly reduced her frustration. She was even able to put signs together into sentences so she could communicate things like: "More milk." or "Where is daddy?"
