Having a teepee playhouse in your backyard is going to be a lot of fun for kids. They can enjoy endless time in the yard with their friends. This kind of teepee playhouse is not hard to build.
What you need are just some woods and sweat equity. Killer B Designs has a detailed step by step instructions here. With a weekend of work, your kids with have years of fun. Isn’t that a good investment of the effort?