How to design a 1000sqft kids club made of timber and cup?

Can you give a hand near colour scheme?
Answers:    We had a storage building/tool shed purchased and delivered to the house that would hold been perfect for a play house. There be two upper loft areas that would have made a great sleeping or video-game area, disappearing the entire bottom level open for table, chairs, sofas, kitchenette.

Check Google descriptions = storage shed