Here I have for sale an incredible sequential discovery puzzle from a literal puzzle master. I am reluctantly listing my copy of Wil Strijbos' Twins Box as I have unfortunately had an unexpected bill come through that has prompted me to make a decision on this puzzle that I'd otherwise not have taken.The puzzle will be very well packaged (this may take some time to ship due to making sure it is well and truly properly packaged - it's quite the heavy puzzle!).I can ship worldwide from the UK - b...