My son already had a duplo collection made up of hand-me-downs and some extra bits like one of those big flat boards for building on (essential for making big buildings), but you can never have too much! this set has a good combination of basic blocks, 'windows' (which we were lacking but make great fun as they open and close) and a couple of fences which have proved surprisingly versatile - they often become a castle portcullis. There is also a wheeled truck which is a must for any boy - we now have a load of them and they get joined up together like a train. I couldn't find this particular set in the shops or even at legoland (windsor) and was very pleased with it.