In the context of the voluntary provision of a public good, I study the interaction of communication and dynamics in contributions. I modify the cheap talk, joint-project framework of Agastya, Menezes, and Sengupta (2007) by considering early contributions that precede communication and by assuming partially funded projects are not completely worthless. First, I show environments in which, without early contributions, parties cannot be trusted to communicate sincerely, so that the joint endeavor always fails. Then, for the same environments, I demonstrate that early contributions can create the conditions for mutual trust, improve the outcome of subsequent communication, and eventually increase welfare. This trust-building role of early contributions matches well with the aims that negotiation scholars attribute to preconditions for negotiations and to preliminary concessions.