7500 Planks, 5 days of work
That one just didn't work.

Reasons for the failures:
- First fail: the kapla with paint dry and become sticky over time
- Almost fail of the leaning towers at the center: same reason: paint that dries
- Fail of the big leaning tower at the right: it was built too close to the last previous leaning tower (closer than in the tests)
- Multiples fails of the wall: I did build previously the same structure with weights in the middle, and it used to work. But this time it didn't, and I'm not sure why. I guess that maybe putting the weights lowers would have helped, but I'm not sure. I think I won't bother with this structure in the future.

Hopefully you can learn from my mistakes.