In my childhood I read a short series of comics about;
- Two young brothers, forced to wander around wartime Europe(?) because they had no papers/identification.
- Common themes were difficulties with the authorities, and constantly having to flee or move on,
- The story stayed light-hearted and humorous, with the brothers typically prevailing against their oppressors,
- The style was similar to an Asterix or Tintin comic, possibly a French or Belgian artist?
- I think there were at least four books - not sure if more existed.
Some plot points or scenes I remember;
- They'd had a home with a big workshop, but were forced to leave,
- The older brother was an inventor, who built many solutions to their problems,
- At the end of each book they'd often have to flee offscreen to escape an angry crowd;
- In one book they built a surprise hot air balloon and flew away,
- In one book they followed a series of tunnels deeper and deeper underground,
- In one book they built a few steps, then kept dismantling and rebuilding each step higher until they were high in the sky. (floating somehow?)
- At one point they had to go around a fortified country border extending out into the ocean.
- At one point they were stuck between two countries, about to go to war over a broken bridge - the elder brother fixed the bridge and moved on.
- At one point they were so sick of the bureaucrats denying them access or requiring papers they didn't have, that they built a 'fence making machine' that built tidy wrought iron fences around every government building.
I have NO idea of the name of the series or the author. I read it probably in the early to mid 1990s.