When building this house it was hard at times but very fun and easy. The challenges that i faced were  with when building top half of the house i also had a challenge with slating the roof at the top and the tools such as the protracter tool.  The tools i used for the first time were the  protracter tool and also using the tool that flattened the roof. the tools that i found very helpful was the eraser tool and the pencil tool it made easier for the house to look really good