Toys and games make my kids happy AND these colorful glass marbles are no exception. Through trial and error, I found that they work best for indoor play near soft surfaces... The diverse set of colors and patterns sparks creativity and helps develop hand-eye coordination. It`s a fun addition to their collection of marble games. i do wish there were more in the pack to give my kids even more options for play. Overall, I would highly recommend these marbles for any imaginative child..