Things to build in Minecraft? - 1

My niece has got Minecraft and is not very creatve… Me being the geek I'm she came to me for help… But I had nothing. Her friends and her are making houses and she wants a cool thing to build as her house. She wants something "kawaii" and not done by famous youtubers. If it's just a plain house she wants it to have twist and turns and secret tunnels and not a normal house. Something cool basically