Purim, the Jewish holiday that starts Wednesday night, is really a celebration holiday. Everyone wears costumes, has parties and eats delicious cookies called Hamentashen, all in celebration of the Jewish victory over the evil Haman. Hamentashen are shaped like a triangle, like either Haman's hat or Haman's ear, depending on who you ask.
Hamentashen should be relatively easy to make. You make dough, roll it out, cut circles, put in a drop of filling and then pinch them into a triangle shape. However, I have yet to make hamentashen where the sides of the cookies don't open up. If you have made yummy cookies and used good quality filling, this isn't a big problem, because they are still delicious, but it can be annoying to do all that work and still have them open. When you are making them with 3 3-year-olds, this is even more likely to happen.
Some important things I have learned:
1. You want to make the dough really, really thin. Thinner than you would think.
2. You should only put in a very, very small amount of filling
3. Use some beaten egg around the edges of the circle before you pinch it to act as glue
If all these things happen, generally they won't open up, but if one of them is off, it won't work. Most important is to use a cookie that is tasty and filling that you like (there are no rules -- you can use anything), so that even if they open, they will still be good to eat.
I used this recipe, from Kosher By Design. Overall, they were a hit with the 3 year olds and their parents.