I used a pen that bounces against an elastic which moves a pair of tweezers. The pen is attached at its tip to a magnet and I flick the pen to actuate the tweezers. I found it interesting how the strong singular force of a flick was converted to small multiple vibrations of the tweezers.
I used a medical glove that pushes a cardboard flap when the glove is inflated. I used a soldering iron holder to precisely restrict the shape of the glove to actuate the flap.
I used a sticky silicone disc folded in half to push against a rod. The disc's actuation is delayed because of its stickiness. I found this to be an interesting way to delay a force and would want to experiment more with these type of materials that can preserve the "memory" of an action.