learned to put the circle in the correct hole somewhere around ten months. it took longer for the other two shapes. the stacking ring skill came a little later (i can’t remember when exactly), but still before a year. we have the fisher price stacking ring set, but i love the other options! i wish i would have seen them when i went shopping!
this is the exact music set we have, i like it a lot, but probably a quarter of the instruments needed to be put away until little man is older. the ball pit and balls is definitely a larger purchase. however, the pit folds up into a 