Some not-binding ideas:


These rides were drawn with reference to the future, where they maybe even enjoy pain more, if that ever happen - after so many cycles (and Twins are probably into it already :) ), so there could be more or less of pain (duh)..

Also, this time their genitals doesn't have to be targeted directly all the time (but they can be just "accidental casualties" anyway)

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A slide - class old toboggan, but only there, if you choose the wrong one, there is a grater on the way down ;)

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A guillotine - you had to pick up something through the hole in the wall, only if you choose the wrong hole, you loose your arm/hand..

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A swing - you have to use a vertical rope and swing over some mud/pool/whatever.. and there is also a horizontal rope full of knots directly under your future line of flight. Only in one case the horizontal rope is much closer to you, so your genitals inevitably got a "slide" of its own :) Probably girls will "enjoy" it more :)

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A see-saw - you have to use your own weight to outbalance it, so it.. I don't know.. drop some key (hanging out of your reach) to the ground.. But under the place on which you sit there is a hole, and there is a risk if you overweight it too much, your ass or pussy got impaled by some "dildo".

After all, impalment doesn't have to be only with the bedpost ;) Maybe one of the Twins "loose" on purpose just to try it, not realizing it is bigger than she thought :) Will she even be able to get free by herself?

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Trap door - if they choose wrong way, they fall to hot water, probably with their ass ahead. Not deadly, as they can get out, but still unpleasant at least.. (they know they are going to be fine tomorrow, but still)

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Yeah, these things are kind complicate to built, but maybe she/they got help from other villagers..