A donation of $4 million for a new Bloomington-Normal YMCA building that will also house Easter Seals Central Illinois on the campus of OSF HealthCare St. Joseph Medical Center is being called a challenge gift. To receive the $4 million gift, the YMCA must raise $4 million by Dec. 31. The Pantagraph reports the challenge gift is from an anonymous family from the Twin Cities. So far, $2.2 million has been raised toward the goal. Other donors must come up with another $1.8 million for the $4 million gift to be secured.