I start by gently peeling each clementine, being careful to keep the segments together in one round shape. Going slowly here really matters, because a clementine that falls apart won't hold its pumpkin shape. I like to peel over a bowl so I can save any loose peel for zesting later.

While the clementines are resting, I cut my celery stalk (or cucumber) into short, stubby pieces roughly an inch long. I trim one end at a slight angle so it looks more like a real pumpkin stem once it's inserted. This little detail makes a big visual difference.

Using a toothpick or skewer, I poke a small hole into the top center of each peeled clementine, right where the stem used to attach. Then I simply press a celery or cucumber piece into that hole until it stands upright. It should hold in place without any extra effort.

If I have a little extra time, I like to draw a simple jack-o'-lantern face on a few of the clementines using a food-safe black marker. Triangle eyes and a jagged smile take seconds and turn a plain pumpkin mandarin into something the kids get genuinely excited about.

Once assembled, I arrange the pumpkins on a platter or tuck a few straight into lunch boxes. They're ready to eat immediately, and there's no chilling step needed since the fruit is already cool from the fridge.