Plastic pots (numbered as used for sign holders for Rally 0) with holes in bottom turned upside down work great for this. The red arrows show the two pots with something inside - for Kira to indicate.We work on a leash for this so I can direct her along the 'route' or she's apt to just barge in and knock them all askew. This one grabbed her attention as there was an "unplanned" bee buzzing inside it; I moved her past before she tried to flip and get it.Nothing in here, let's check the next one....Aha! Let's flip this one over and claim the prize!Smelling this one. When she reaches them, it only takes an instant to scent over the holes and either move on past, or flip it if it has something inside.And this one did, she's about to flip it.Wow! That was fun work. Time to play.