MC and IC know the rules. And they know why they are not allowed to do that: because we dont know where they come from, it could hurt them, and it might just make them sick with a simple touch.
It would be a another story if we are really outside to collect nuts or dried leaves or whatever things from nature that they would need to create their master pieces. But if they see a toy or a hair clip or a bottle or anything along the street, we always say never ever touch it or worst, dont ever think of bringing them home.
When and if they saw something really interesting and they are not so sure if they are allowed to touch it, then they ask.
Since the girls were way ahead of us, and IC was making me busy with her questions; I wasnt aware of what was happening in front of us until I heard the bottles landing on the street. Apparently, it was becoming too heavy for her to carry her 'treasures' alone and she was asking MC to help her.
MC was just looking at her and not responding. When she saw me, she started telling her playmate to throw those things away. 'You are not supposed to do that. Those things are dirty and you might get sick from those things,' she admonished.
I dont know if she'd have joined with collecting those things if I am not around. Anyway, I am glad she remembers the rules and the why.