My daughter is five years old, she has used computers at school and occasionally my laptop, but I discourage that as I like my laptop to be moderately clean and in one piece. We have played with Scratch in the past and she loves it.
The other day she asked to play on the computer. "Not your computer Dad, the little one!" We booted up the Pi and she was happy as larry for nearly an hour. We don't have a modern TV, so 'Scratchy' was painful on the eyes through the composite connection, but she had great fun playing around typing in a text editor. She typed her name, my name, stories only she could understand. She 'practised her letters'. She didn't know she was learning.
None of this is very much or significant on the grand scheme of things, but she had real joy computing and this must be what Raspberry Pi is all about. We have already had £30's worth of enjoyment out of this little machine, the rest of the 'playing' is now free.

