These marble trees by Magic Wood are beautiful. I mean it. The sound is actually soothing. I bought ours at Pippin Toy Co. They still had the medium (smaller of the two here) and an even smaller version so call them first if you’re local! They may have more on order. I found a few other lower priced options that I linked, too, but can’t speak to their sounds, of course. Also helps that these are aesthetically pleasing! marblerun marbletrees kidstoys LTKKids