“Fun day riding in the sunshine with Harper x #mylittlepony x vb,” she captioned the image of her preschooler on a white horse.
The singer-turned-fashion designer, 41, is also mom to sons Brooklyn, 16, Romeo, 13, Cruz, 10, with husband, former footballer David Beckham.
The soccer star, 40, recently dished on his “strict” wife.
“Victoria is definitely the strict one,” he said. “I think the kids are definitely more scared of Victoria than myself,” he said, and joked, “Me too!”
He added: “Balls get kicked around the house all the time and to be honest, I kind of like it. But, you know, you have to put a foot down at some point.”