Every pond has a turtle who thinks he's the main character. This set of four gives him the spotlight, along with the koi, the frog, and the cattails that frame the whole scene.
The palette is sage green and dusty pink, soft enough for a nursery but with real texture in the brushwork, that thick knife-painted look that catches light instead of just sitting flat on the wall. One piece is all cattail reeds swaying against pale water. Another is a koi fish mid-turn, leaving a ripple behind her. Then the turtle, sunning on his log like he pays rent there, and a frog gripping a reed stem with the kind of focus only a toddler could rival.
This is animals wall art that reads sophisticated instead of cartoonish, which matters when you're decorating a nursery you'll actually have to look at for years. It works in a kids' bedroom, a playroom, or that lake house guest room that's needed something on the walls since you bought the place.
Hang all four together for a gallery moment, or split them up. Either way, this is neutral nursery decor that doesn't feel babyish, and doesn't feel boring either.