Star Trek Deep Space Nine - Cardassian Imps1997

From Memory Beta: Bored stiff, Jake and Nog are looking for action -- in all the wrong places. They've played all the family holosuite games -- and the adult games are strictly off limits. So when Garak, the only Cardassian on Deep Space Nine, suggests a trip to the unknown depths of Level 45, they're ready to go. When they arrive on the musty, abandoned deck, they find a funny Cardassian toy that says "Moop" when activated. And then they discover the replicator button on the toy. Perfect! They can replicate enough "Moops" for a baseball game. But suddenly the figures that stand before them are all as tall as Nog -- and they're replicating themselves!