As for HB0 I think there is a very limited amount of family friendly summits available, all of the summits are above 2000m sealevel. You can have a look at SOTA MAPPING PROJECT … there i uploaded gps-tracks for three of the easier HB0-summits:
I am activ in the area DM/NW. Her are a lot of summits. Some of them are easy to reach. Nice Citys to start are Winterberg or Sundern. I think familie friendly means hiking and not climbing.
In HB0 Austenberg is possible. On the way also easy is OE/VB-512 Pfänder.
Thanks for the suggestions. I meant summits you can hike and not climb or exposed ridges, summits. The ones you are suggesting seem ok in terms of distance / elevation gain. I will have a detailed look at them.
The WX will have the final word wether we visit or head down straight to EA5.