My 2 cents:
1. This dog looks more agitated than “playful”
2. In general, animals should be kept away from small children. There are many, many tragic cases of even “tame” animals deciding to harm kids.
I’d trust small puppies or kittens with a child this size, but that’s about it. Certainly, not a doberman—even supervised.
The dog was playful, giving the stereotype play bow before coming near the baby.