compliant - disposed or willing to comply; "children compliant with the parental will"

obedient - dutifully complying with the commands or instructions of those in authority; "an obedient soldier"; "obedient children"; "a little man obedient to his wife"; "the obedient colonies...are heavily taxed; the refractory remain unburdened"- Edmund Burke

manipulable, tractable - easily managed (controlled or taught or molded); "tractable young minds"; "gold is tractable"; "the natives...being...of an intelligent tractable disposition"- Samuel Butler

manipulable, tractable - easily managed (controlled or taught or molded); "tractable young minds"; "gold is tractable"; "the natives...being...of an intelligent tractable disposition"- Samuel Butler