Are your children fascinated by the lights and vehicles? If so, call your local stations (but not 911) to see if they offer tours. Usually they are most accommodating.
Hudson
Police Station - 62 Packard St., 978-562-7122
Fire Station - One Washington St./Wood Sq., 978-562-3434
Marlboro
Police Station - 355 Bolton St., 508-485-1212
Fire Station - 215 Maple St., 508-485-2323
Northboro
Police Station - 211 Main St., 508-393-1515
Fire Station - Pierce St., 508-393-1537
Southboro
Police Station - 19 Main St., 508-485-2121
Fire Station - 21 Main St., 508-485-3235
Westboro
Police Station - 45 West Main St., 508-366-3060
Fire Station - 42 Milk St., 508-366-3040
Berlin
Police Station - 978-838-7355
Fire Station - 978-838-2444
Boylston
Police Station - 508-869-2453
Fire Station - 508-869-2113