On Tue, 17 May 2011 10:16:14 +0100 (BST), "Dave Liquorice"
wrote:

On Tue, 17 May 2011 09:15:55 +0100, Mark wrote:

We have a kind of rota and two computers for the 3 kids to share.

We have one computer (for the kids), two kids and "tokens".

Tokens for a fixed period of 30 minutes each.
Maximum of eight tokens per day. (4 hrs)
Tokens only valid between 0630 and 2130 each day.
Home work on the computer uses tokens.
Home work to be done before any computer use.
Tokens do not have to be used.
Unused Tokens give no right to computer use.
Unused Tokens are not carried forward.

Are these physical "coin-in-the-slot" type tokens?

--
Frank Erskine