I have a 2yo and 4yo and this still puzzles me... Is it OK to let your children climb up the slide at the park? Obviously not at soft play or places where there are signs saying not to. My rule of thumb is its OK as long as there's nobody coming down the slide or playing near the side and likely to want to come down, and my children don't have muddy feet, then i say its OK. What's the general consensus?