prof611:
"Totally symmetrical puzzles are very predictable to solve. They are accepted only if the image is designed for kiddlers."
I want to clarify one issue about the Kiddlers. We no longer add puzzles to this section. Maybe that's why you thought some symmetrical puzzles weren't designed/selected to be Kiddlers.
In the past the Kiddlers Team reviewed new puzzles every day and added them according to the Kiddlers rules. We set the amount of ~1000 puzzles and decided to stop adding new puzzles because we thought the quantity may intimidate our young (not necessarily by age) users.
The idea is - let the beginners start with the Kiddlers, then - they can try harder puzzles, or stay with what they feel confident enough, like - symmetrical puzzles.
After clearing this up, users are invited to discuss this matter:
Should we or should we not have symmetrical puzzles.
Hagit