Rainbow is a British children's television series, created by Pamela Lonsdale, which ran from September 1972 to December 1992. It was intended to develop language and number skills for pre-school children.
More than 1000 episodes were created, with each episode centred around some kind of squabble or dispute between the puppet characters of Zippy, George and Bungle, and Geoffrey's attempts to calm them down and keep the peace. I don't know firstly how the script writers managed to write 1000 episodes on this basis, or how Geoffrey was able to stay sane throughout. Nevertheless, it was extraordinarily popular.
You can find the cache at:
S 41 sleep shadows soft zippy smooth
E 174 singalong magic sleeping spring snow
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The cache is an eclipse tin inside a camo'd exterior, with log only, please bring a pen
Take care when approaching GZ, avoid attempting this at school drop off and pick up times, or risk looking a little out of place.