To export several sets, go to the exporter. If you use the data I'd really appreciate a link back to Brick Insights. It keeps this site going.
Our newly 4 year old loves this as we got it for her for Easter. She has a 3 year old younger brother (and 2month old brother) and he played with her with it and so far we haven't lost any pieces. With some minimal help she was able to look at the visual/picture instructions and put it together. My main concern is when our littlest little guy starts crawling/being interested in the "big kid toys". Other than that concern we really like the set--- allows for creativity and lots of time reassembling/changing the designs minimally.