That's a good teacher.

I think the key part of negotiation is anticipating the range of acceptable values of your counterparty, and the strategy of offering a limited menu of choices impedes that learning. That perspectve taking before the negotiation begins is crucial because it anchors your Bayesian calculations during the negotiation. Why not ask your DD to make an offer, where possible? I find DS is quite reasonable when I give him carte blanche, and if his initial suggestion is unreasonable, I explain why and ask him to try again without making a counter offer. Only when his opening offer is reasonable will I participate, and I force a null outcome at impasses.

I do this for two reasons:

1. It requires him to evaluate both our ranges.
2. It trains him to make the first offer, which the negotiation literature says is a more successful strategy due to framing and anchoring.

Would your DD be open to practice exercises with toys, or if given hypothetical scenarios for others?

What is to give light must endure burning.