I have a load of bags of matchboxes (I bought like 1,000 plain white ones from Amazon). Each bag is about 16 and each one has letters drawn on to it. Can just grab a bag for each couple of kids and demon searching and sorting dead easily off the cuff.

One day I must write up my brown box computer somewhere - great programming tool without computers!

I have a load of bags of matchboxes (I bought like 1,000 plain white ones from Amazon). Each bag has about 16 matchboxes, and each one has letters drawn on to it. They can just grab a bag for each pair of kids and demonstrate searching and sorting, really easily.

One day I must write up my brown box computer somewhere - great programming tool without computers!