Christmas Cache

[4 and the dog]

The kids want to set out a cache specially for Christmas. It will be a puzzle cache aimed at kids, around a christmas theme, and the idea is to find the cache and take a gift. Here's what we're not sure about. There will be no need to ''swop'' as the gift will be the reward for the kid/s for solving the puzzle. After christmas the cache could revert to being a normal swopsie cache, until next Christmas.
Does that breach any guidelines? The only one we can think of is the swops issue but wouldnt it be ok to say no need for swops so long as kids find it? We would keep it stocked with small gifts Christmas Eve - on Jan 1st it would become a normal cache. Any thoughts?