The tiny tin belongs to my OH and is full of half pans fixed in with sticky fixers, I doubt they can be moved easily, but they don't need to be
The larger tin, I used a tin I had and liked. Fixed them in with...
Bluetack! or it may have been putty (kneaded) eraser, the grey one. Didn't take much and they can be moved if I change my mind, but haven't budged since I put them in before Christmas
It couldn't have been easier
Do you have a nice tin pencil case? Bluetack? Dark grey (soft) Putty rubber?