Review on POPLAY Beautiful Marbles Multiple Whistle: Versatile Sound Maker for Kids and Adults by Jared Barit

Depending on what you're looking for this is a great buy. I didn't bother too much with the color although the light blue and clear colors are nice. I bought marbles to put in a jar every time I completed a certain task, and when the jar was full, I rewarded myself for completing those daily tasks. I dropped them on a tile floor and they held up great, as did the tiles. They have worked great for me as a motivation/reward tracking system!