I have no personal experience with Tools of the Mind so I can only say that the word “curriculum” in early childhood education always makes me wary. A curriculum is created by adults to give them the structure and outcomes that they desire. It's designed to meet the demands of politicians, school administrators, and parents. Therefore, it's adult-centered, not child-centered.
A child-centered preschool is one where play is the only course of study and kids are the instigators of their learning. Instead of concentrating on predetermined knowledge they want to instill, teachers focus on their roles as facilitators of play. They allow kids to explore and interact without interruption. Youngsters, therefore, create their own curriculum based on their unique interests and curiosities.
Teachers who advocate for play make themselves available to the children. They respond to them at the moment because they're not bogged down by a curriculum that needs to be adhered to and a tight schedule that needs to be followed. Research shows long periods of undisturbed play are necessary for kids to acquire meaningful knowledge. Deep learning doesn't arise by kids jumping from station-to-station to do teacher-directed activities, which is so common at preschools today.
A child-centered preschool centers on the youngsters' imaginations, not on academic preparation for kindergarten. There's no curriculum for it other than playing. It's accomplished by providing an environment with dress-up clothes, a pretend kitchen, a puppet theater, a performing stage, a dollhouse, art materials, and so forth.
Instead of preschools with a preset curriculum, I recommend those with a strong philosophy. You may want to read my article entitled: “Montessori, Waldorf, & Co-op: Why Philosophy Matters at Preschool.”