 Seven days later, Interior Secretary Lujan agreed to transfer of Kingman Island to the District of Columbia for construction of the children's theme park.By now, National Children's Island, Inc., was advocating a $120 million park which would include science, nature, and geography pavilions; an entertainment building; a plaza that would host fairs, marketplace booths, and outdoor performances; a science center; and formal gardens—while still preserving much of the two islands as a nature preserve.Under terms of the agreement transferring the land to the city, no more than could be utilized for buildings, and no structure could be taller than .