I'm a librarian and we recently received one of the Junior Maker Lego kits that LEGO distributed to 15 libraries in each state. It's a wonderful kit and includes a lot of basic blocks along with many numbered bags that clearly go to sets. However, none of the set information is included, nor can I find it online. Some I know are from the Chima theme based on the minifigs. I'm happy to upload pics if you all wouldn't mind helping, but there's about 20 different ones. Is there an easier way to do it?
If you really want to know, I would suggest identifying the most unusual part in a bag, then using that part, search for what sets it has appeared in recently. Each piece usually has a small number printed on it. Use this part number on bricklink, or peeron to search for the part, and then click the link that shows you what sets it has appeared in.
Alternatively, take a picture of the bag and post it to the AFOLs of Facebook group and you'll probably have an answer in 5 minutes or less.