I would of kept the stuff. Sell the suit, Keep the handcuffs and whip.
If they asked I would of questioned them as to why that would be in a loaner.
Either that or just would have told them. Wouldnt have been mad, not the dealers fault really they just forgot to check.
Also what would a little kid freak out about? The only thing is the bear everything else would just be normal unless the kid was old enough to understand.