BBC has eight free printable Doctor Who coloring pages of the Tenth, Eleventh and Twelfth Doctor Who characters, as portrayed by David Tennant. There are coloring pages of Martha (one of the doctors' assistants). There areonline Doctor Who games featuring Mickey, Rose, Sarah Jane, Martha and other characters. There are printable coloring pages of Doctor Who monsters and villains--Daleks (they're aliens that resemble salt shakers). Some of these characters are in the Doctor Who spin-off "Torchwood" and "The Sarah Jane Chronicles."
BBC One has free printable Eleventh Doctor Who activities, too. Oh and don't miss the super creepyfree printable Doctor Who masks. Cut and paste masks of the Twelfth Doctor (Peter Capaldi) and Doctor Who villains--Ood, Silurian, Smiler, the Master, Silence, the doppelgangers, the Weeping Angels and a Peg Doll who makes Chucky look like Chuck. E. Cheesecake! These would be perfect for Doctor Who Halloween costumes. But beware of the Weeping Angels--don't blink--they're Doctor Who's scariest, wiliest opponents of all.