How to get here
At landakort.is you can see a map showing you the way from the airport(Keflavík) to Reykjavík and from Reykjavík to Lækjarbotnar.
The easiest way is taking the fly bus from the airport to the BSÍ (center bus station in Reykjavik) and from there either take a taxi to Lækjarbotnar or take a bus going to Hveragerði and Selfoss and ask the driver to stop at Waldorfskólinn i Lækjarbotnum. And from where the bus stops you have to walk about 1 kilometer. Taxi will propably cost 4000-5000 ISK. More information about Taxi in Reykjavík. More information about the busses and departure times at bsi.is and re.is. Airport Express Bus costs 1.300 ISK (Keflavik-Reykjavík city).