So I will give it a try, without any guaranty that I'm totaly right with the age
1. Father XMas - Short with Dakota Fanning)
3. En liten julsaga (1999)
4. Quatsch und die Nasenbärenbande (around 3 or 4 years old)
5. What We Did on Our Holiday (one of the kids) - https://www.youtube.com/watch?v=P5T2Z9q8Bqg
6. Florida Project (6. yrs. old in the plot and must be around 6... And Brooklynn Prince play a really awesome role)
7. We bought a zoo (Maggie must be around 5 or 6.yrs in that movie... I think more 5.) https://www.youtube.com/watch?v=Krh1koDU2uE
8. Nesthäcken (German TV Series with a 6. yrs. old)
9. Lotta på Bråkmakargatan (Astrid Lindgreen / Series)
10. The Fall (Catinca Untaru must be around 5 or 6 yrs. old)
11. Im Spinnwebhaus (One of the Kids named Miechen (Emilia Pieske) in the Mainrole / german movie)
12. Usagi Drop: The Movie (2011) / 6. yrs old)
13. My kid could paint that (Documentation about a 5. yr. old girl who have a surprising success with her artwork)
14. Good Luck Charlie (Well, the series is named for the smallest one of the Family, but she's not in the total focus of that Comedy from Disney... But Mia Talerico is sooo sweet and it's interesting to see how she's growing up. Must be available on Disney+ to stream)
15. Kdopak by se vlka bál (Around 6)
16. Allons enfants AKA Cléo & Paul
17. Wrony / Crows