How about this plant?

[Mark M]

Found it wet areas especially near beaver ponds. It is a natural treatment for poision ivy.

[SwampDonkey]

Jewel weed or spotted touch-me-knot, same thing. Hard to tell by the photo Mark. looks like a woody shrubs. But, this plant is in the succulent nightshade family. It works to sooth stinging nettles also, and I usually find the two together, which is nice. When the seeds are ripe, you touch the pod and the pod explodes firing the seed out. It has a hair-like trigger that is sensitive to touch.  

[Mark M]

Yep - they are a lot of fun, especially to children who have never seen them.

[Tom]

How big do they get in ND, Mark.  You been sawin'em.

I wonder if they grow around here.  Sounds like a neat toy.  
We have some plants that are neat toys too.   A grass that the seed pod is used for a Wooly caterpillar.  You can squeeze it in your fist and it'll crawl right out.

Sensitive Mimosa.  Touch it and the leaves close up.

Honey Dew, pitcher plants and venus flytraps that catch insects and eat them   Ar-r-r-rgh-h-h-.  

[SwampDonkey]

Sensitive plants and fly traps are really cool   We don't have those up this way, only in books.

[Mark M]

Hi Tom

I've never seen one here in ND and don't if they even grow here, maybe in the east where it isn't so dry.

What's fun with that plant is when they get really ripe. You can start a chain reaction by setting one off. It's seed will fly and trigger a bunch more and they trigger more and more.

I like those Mimosa plants, I think it is pretty neat that plants move. Up here the young sunflowers follow the sun. In the morning they are all facing east waiting for the sun to come up. It's pretty hard to drive by a big field of sunflowers and not smile.

[SwampDonkey]

If you have any pine, you can observe the young candle shaped shoots tract the sun also.