According to the article I found this in, it started off as a travel blog, built a newsletter database, and when people began asking them to help book trips, they bought a travel agency and began selling holiday packages.<p>[Edit] found the link to the article (paywalled)
<a href="http://www.theaustralian.com.au/news/features/have-kids-will-travel/story-e6frgabx-1226577329382" rel="nofollow">http://www.theaustralian.com.au/news/features/have-kids-will...</a>