There was a logical coding game where they had to follow a series of instructions and see if the ended up on the right square on the grid,
They also made cypher wheels
and hidden 'scratch off' messages.
There was a Lego educational centre where they had to build and program a special Lego robot and see if it obeyed its programming.
In the afternoon they did a big version of the coding game using the kids as the game pieces and learnt about semaphore (we missed these as we had to leave early)
They also had a laptop running with scratch a free coding game for kids.