I think I may have an answer for you. Nature detectives (www.naturedetectives.org.uk), by the woodland trust, is full of ideas to keep the kids busy and away from the telly. They have 100 summer activities, including my favourite the leaf idial.
The alternative world cup calendar (www.naturedetectives.org.uk/worldcup.htm) provides 31 days of telly free entertainment to avoid the world cup completely or give dad some ‘me’ time.
Wet & cold outside or just unable to get out? No problem. There are loads of indoor activities such as crosswords, colouring in and online games. It really is a great site and won 2nd place in the 2009 green web award