No, there are no travel restrictions on V-1 visa. As long as you possess a valid V-1 visa you may be inspected and admitted to the U.S. after traveling abroad. If you have a pending Form I-485, Application to Register Permanent Residence or Adjust Status, you do not need to obtain an Advance Parole prior to traveling out of the U.S.
Note: The departure of a V-1 nonimmigrant with a pending application for Adjustment of Status is not considered as the abandonment of the adjustment application upon departure.
Yes, you may bring your unmarried children under the age 21 (not born to your U.S. spouse) under V-3 visa.