Conkers (horse chesnuts from the tree of the same name), are basically used in a children's game. Other than that you don't really do anything with them.American here. wtf are conkers? Why is she so obsessed with them? What do you do (make?) with them?
A game of conkers is played by two people. You still a hole through the conker and thread a piece of string through so you can use it to try and smash the other players conker.
Doesn't sound particularly fun, but was a great kids playground game until schools banned the game of conkers for health and safety reasons.
There is also theories of how best to harden a conker to make it stronger, baking it, soaking it in certain liquids.
Have also included a video of the Conker World Championship for more visual showing of a game of conkers.