A nonprofit preschool and child care center for children 12 months through 13-years-old is opening Sept. 29 in Greeley.The Key Explores Preschool and Early Childhood Center is located on the east side of 2332 W. 27th in the garden level of 23 Church. The center is not associated with the church.It will be available before and after school on all days public schools are on break, including summer vacation.