Toys and games never get enough of our kids` attention but after trying this marble game, they've been hooked! The replacement marbles are compatible with our previous toy version so no need to buy another set altogether .It's a great way to keep the young ones entertained while they develop hand-eye coordination, motor skills, and social interaction. The only downside is the lack of instructions, but with a bit of creativity, we were able to adjust the rules to suit our gameplay..See full review