Elf On A Shelf
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Well how about I give you 6 of them and then you can take one for the first stage of the XC then swop onto a "fresh" one for the next bit it, then another, then another, then another and the last one you hop on after the last fence to cross the line on so you have a happy, non-tired horse to finish on - who can tell one black shetland from another anyway? No one will know!