Why do people feel the need to 'improve' upon something that is pretty damn amazing anyway?
Show children what a woodland is like, let them be enchanted by the natural things, by the age and majesty of the trees, the patterns of sunlight through the branches, a glimpse of a deer or the song of bird.
Plastic rubbish doesn't add to nature, and it is indicative of the entitled attitude that prevails - 'I can do whatever I want, because I want to'. If you aren't sensible enough to go into a wood without leaving a load of plastic harmful litter then go somewhere else.
if you want to build a plastic shrine do it in your own house or garden, where those who don't want to see it don't have to.
This is the point - if you want to look at plastic tat (and obviously many kids do) that;s fine, but don;t force it onto people who like their natural spaces natural. You have a choice of doing it elsewhere, people visiting the woods are not being given the choice not to see it.
Quite apart from the harm it does to the environment which if you don't understand you are beyond dim.
Rather than people who don't like this littering being grinches and not liking Christmas or whatever. I would suggest that people who do like this kind of stuff are those people who like to see their dogs running through a field of sheep ('because he likes chasing them') or who like to take eggs from birds nests (because they won't miss just one).
We don't own this planet, we share it and we need to respect natural spaces because they are the homes of other living things. They don't come and shit on your carpet, don't leave your shit in their environment.
And don't even get me started on rock stacking - fuck off idiots, if you don't like nature the way it is, go and stare at your phone for six hours instead.