This Ki-XL set contains 350 pieces, including three sets of tools (hammer, pliers and wedge) and building instructions. There are enough blocks for a couple of children. 

The set is designed for kindergartens (children aged 3 to 5), but many parents get it for home use. There are heaps of blocks for large projects, or for a couple of different smaller models. Having three sets of tools means that there are no fights amongst siblings anymore for the hammer. And you can invite friends to join the fun.