dendrobates luecomelas

My little guys, three Luecomelas, keep on climbing to this little perch near the screen of the tank, should I be worried at all or just let them enjoy it for now before they outgrow the spot?

I now have a my three luecomelas, all bought from LLLreptile, and here they are! I think they look pretty cute. And This is my case for them, which has been seeded with Dwarf gray and dwarf purple isopods, and tropical white springtails. I would like to think the tank looks like it's coming by...