There are millions of things you could do ! Build some secret trap door with piston or a mob/player trap. Create a whole building or castle filled with little widgets all powered by redstone stuff like that! If ou rly wanted to just look on YouTube at channels like sethbling and try and build one of his creations! Arctic
Ok guys thanks for the replies so soon, server will be up in at least 2 weeks. There will be no whitelist and mods, admins and staff will be aloud on the server sooner then everyone else