What else can i build? Minecraft?

So, me wnd my friends are playing xbox Minecraft and we have this awesome house, and we ve built a lot of things already that are necessary for survival. (Playing on survival) and we need more ideas of what to build, its just me and my friends so i can't really make it go public and build hotels and such. We have: a working kitchen, personalized bedrooms, an enchantment room, a huge storage area, living room/decoration, a neather wort farm, brewing station, a stable, a dog house, sugar cane farm, chicken/egg farm, wheat, melon, pumkin, carrot, potato, cow, sheep, pig farms. And not just that! We ve made pathways and such from place to place and a little garden. We have enough ores and wood and materials, is there anything that you guys can think of that we can put into our world?