THE BEAN BAG THEARY IS JUST SO THE ONE YOUNGSTER CANNOT SLIDE ABOUT, MORE SO IF ITS ON THE BOTTOM OF THE NEST BOWL WITH ITS FEET SLIPPING, I REMEMBER THE OLD TYPE NEST BOWL, STILL A FEW GOING ABOUT, THEY GOT VERY NARROW AT THE BOTTOM, SOME OF U MAY HAVE SEEN THEM, BUT KEAP NEST FELTS (I USE PACKED HAY) AND PLENTY STRAW, WHAT U HAVE GOT TO WATCH WITH THE BEAN BAG THAT IF THE YOUNGSTER IS VERY SMALL IT COULD COVER IT, I WAIT UNTIL THE YOUNGSTER IS GETTING MOVING ABOUT, SO LONG AS ITS NOT TOO LATE, BEST THING IS KEEP YHE BOTTOM OF THE NEST PAN COVERED WITH NEST FELT ETC.