Since launching Stumbelbloc in February 2010, the uptake has been phenomenal and unskilled workers are building in South Africa, Mozambique, Namibia and beyond. We have realised that in practice, the blocks can be cast VERY quickly - in fact much quicker than we originally thought. Using a simple vibrating table one or more blocks can be cast from start to finish in 15 seconds! This video - shot in a small blockworks in Cape Town - will appear shortly on our website. For more information go to stumbelbloc.com Stumbelbloc - Simply building the future!