Salvete!
Just to give everyone a basic reference point in case I post something where it might help …
I'm living in Paderborn, Germany, and have been practicing Aikido for around 12 years now, if I count correctly (a little over a year of Aikikai in Essen, all of the rest Tendo-Ryu in Paderborn, not counting a break of approximately two or three years). A while ago, I started helping in the kids' and junior training and recently have been made to take over the kids (ages 6-12).
Well, so far it seems to go well, but as many of you will probably remember, caring for extremely different levels of ability (not to mention body control etc.) is a skill that takes time to develop …
All the best,
Christopher