This is the recipe that I used. It was perfect for a parent/kid cooking activity. The filling was twice as much than was needed for the dough amount, so I ended up buying more sour cream, making another batch of dough, and making another bunch of pierogies today--so if you're planning on making these, be aware.
My kids prepared the potatoes for the filling: peeling and chopping them. They also helped dump ingredients into the mixing bowl for the dough. I rolled out the dough, we all cut them out with a biscuit cutter, my one kid filled the circles, and my other kid sealed them up on the edges with a fork. We let them freeze on cookie sheets (lined with parchment paper) and freezer-bagged them. I took out a dozen and boiled them in batches of 4 until they floated, then I added them to a pan with butter and sliced onions (and a little bit of sugar). Every time I added the pierogies to the hot pan, I'd add another slice of butter. I cooked them until they were golden on each side, and I served them with sausages and roasted brussels sprouts for dinner. So delicious!!
I messaged a photo to my Dad, and he told me all about his Polish grandmother making homemade pierogies. Apparently, Great Grandmother would make cheese-filled pierogies and serve them with hot cherry pie filling on top for a Christmas Eve treat.
Keep family traditions going! There's no better way than through good food!