Unfortunately, not every program be subtitled in uitzendinggemist.nl (during broadcasting on tv the subtitels are possible at teletext, but this information has no relevance for you). From the most populair programs (and the programs that be latest broadcasted) - without the restrictions that you already got, are usually subtitels available at uitzendinggemist.nl. Whitin the Zapp selection (children programs for 6 untill 15 year) be that for example:
* 'Het klokhuis'
(an educational program about all kind of subjects mixed with small satirical sketches about that subject - sometimes very funny
(a daily soap for children that takes place at a secondary school) - by the way the word 'Spangas' is coined.
* 'Freek op Safari'
(a safari program for children which is presented by a very energetic and engaging biologist).
* 'Dokument junior'
(a documentary series about serious subjects that children able to experience/get along with one [I don't know how you say that in English] - not only misery by the way).
* 'Puberruil Z@pp'
(a program in which two teenagers turn over their lifes for two weeks).
And there a lot of other programs with the subtitels option (look to programs with a lot of episodes and to programs that be newest broadcasted).
Good luck on learning Dutch!