Today we held our first event at Lord Louis Library. We had a space in the children’s library for 90 minutes, set up several tables and chairs, and put out lots of games for people to try. Games from around the world included Picaria, Five Field Kono and Mancala. Games from our 1970s/80s childhood included Foxy, Stay Alive and Rubik’s Race. We also had Bridg-It, Joggle, 3D Noughts and Crosses and Spot It Jr.! Animals. We set aside two tables for the children to practice Ghost Blitz (versions 1 and 2), in preparation for the 2019 Ghost Blitz Championship. My friend could not have put it better when she said this game is fabulous for the children’s cognitive development. Read one of my previous blog posts for a full description of the game.

As we were approaching the end of the event, I decided it was time to start the 2019 Ghost Blitz Championship. Six children entered, all aged from 8 to 11. I had chosen 20 cards from Ghost Blitz 1 which were all of the type where both items are the wrong colour. This was an individual timed challenge, with each child competing against the stopwatch to be the fastest to get all 20 cards right. The winning child had an impressive time of 65 seconds. I gave prizes to all six children. The look on their faces as they received their prizes and applause was genuine and heart-warming, and made the whole event worth the effort of organisation and planning that went into it.

We enjoyed the opportunity to meet new families and show people the games that we enjoy so much. Thanks to the Friends of Lord Louis Library for their help in publicising this event.

For our third week of Bletchley Juniors we tackled the Caesar cipher. I started with a very brief overview of who Julius Caesar was, including looking at a map of the Roman Empire (any excuse to get a map out). I explained that Caesar shifted each letter forward by 3 (A becomes D) in order to send coded messages. I wrote out the alphabet on the whiteboard, all on one line. As a group we encoded the plaintext ‘julias caesar’  as MXOLXV FDHVDU; we decoded the ciphertext ZDV ERUQ LQ URPH as ‘was born in rome’ by shifting each letter back by 3. I gave every child the opportunity to both encode and decode a letter.

I then showed the children a Caesar cipher wheel, explaining that it could do both the adding and subtracting for them, saving time. I gave each child a cardboard sheet with the blank template of the inner and outer wheels printed on it. The children wrote the alphabet on both wheels, cut them out and pinned them together. I showed them how to set the inner wheel to a shift of 3. I gave them each a ciphertext to decode, which took the form of a statement which was either true or false e.g. there are five different chess pieces (false, there are six).  Each child was able to successfully decode their ciphertext. I then asked them to use their wheel to encode a message to someone in the group in ciphertext, then swap over and decode into plaintext. There was just about enough time for this before the session was over. As with the first week, the children enjoyed the chance to make something with their hands, as well as learning more about ciphers.