Today was a day sustained by strong black coffee and lockets.  Every single minute of a full (no free periods) day was filled by demonstrations on the art of packing rucksacks.  Bags begin by being bulging with tents and sleeping bags strapped to the outside.  They insist and scream in tantrums that it simply is impossible to pack.  Often all the toys are thrown far from the pram.  A few minutes later I pass back to them their rucksack with everything neat, tidy and squared away.  They respond with withheld awe and a hint of suspicion, as if I have conned them or tricked them as a quick handed magician would.