Employee Only Plan - means only you, the employee, are enrolled in coverage.
Employee + Spouse Plan - means you and your spouse are enrolled in coverage.
Employee + Child(ren) Plan - means you and at least one child are enrolled in coverage. You can have more than one child enrolled in this plan, but not your spouse.
Family Plan - means you, your spouse, and at least one child are enrolled in covered. You can have more than one child enrolled in this plan without the premium increasing.