Sticky film for windows?

[xlatia]

I need your help please, as I'm too daft to google...

I'm looking for sticky film that goes on windows, but the stuff that's sticky on the side facing INSIDE the room as well. I don't need it to block out views from outside, just want something where DS can stick stuff like leaves, small pebbles, ect. without actually having to mess with glue. I know I've seen it on the internet before, but cannot remember what it's called.

Any ideas, please? Oh and ideally it's not glued to the window so it can be removed easily without trace.

I've not heard of this before.
Sounds amazing stuff.
I'll have a hunt around too

I can find loads of the static cling film, but none with a sticky side too

So a double sided sticky tape in a huge quantity?

Love it doesn't even have to be a huge quantity. The one I saw in pictures was about the size of one A3 sheet of paper... I'll have another look around and shall update if I'm successfull!

Mac static - duh - that was the word I couldn't think of for love nor money when I posted initially, maybe that'll do the trick

Good luck!