This past Sunday, we decided that it was a good time to raise the railing on her crib since she mastered pulling up and is learning how to step on top of objects. We didn't want to risk her toppling over or using her stuffed animal to climb out the vein and fall. Knowing how fast Zakiah is learning new skills, we didn't want to put anything past her.
As you can see, the higher railing didn't stop her from pulling up. The girl just doesn't choose to sit very long.