Something cool to make in minecraft with redstone?

My wife is addicted to the game minecraft (Xbox if it matters) and she has tons of redstone… About 10-15 stacks of it… Problem is, she likes to play on peaceful mode… And all I can find to make, that would be useful, is traps (which we have no need for) she has a huge cave underground and she loves exploring, is there anything I can build her that could help her or benefit her somehow? I don't know redstone well and same with her

A Rube Goldberg machine that eventually throws a snowball or an egg. Incredibly long and complicated, for something really simple.

I'm a big fan of automated doors myself. Elevators are also quite popular.

You can make an automated train track with those being part of it. They pretty much make it go.

http://minecraft.gamepedia.com/...craft_Wiki

here is a website which tells you everything about the game. It will tell you how to build it and with what things.

Hope this helps!