Mijn kleine rotspoel

The little fish and shrimp actually dart into those cavities under the rocks—my toddler loves lifting each one to peek at them. The three sorting shapes are chunky enough for small hands, and the rocks themselves have a nice gritty texture.

My shrimp finally have somewhere to actually hide instead of clinging to the filter intake. The three large rocks sit snugly over the cavities and my little goby keeps ducking in and out of the holes. Genuinely fun piece to watch.

The shape-sorting base is what sold me — my daughter matches the three pieces over and over, then flips the big rocks to check the cavities underneath. Way more engaging than the usual bath toys that just float there.