Cardassian Imps (Star Trek: Deep Space Nine: Young Adult #9)

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 as tall as Nog - and they're replicating themselves!