Hi,

Found a book of kids holiday activities floating around at work, and it has a website where you can download a PDF copy of the book. There's probably lots of different things like this around, but this one is for our neck of the woods.

http://www.regio-ferienpass.ch/?idpage=2

There's really cool stuff for kids to do (does cost money though), like t-shirt painting, visiting the fire brigade, bread baking, etc. etc.

Anyway, have a read if you're interested.
Maybe people who have similar resources for their local area can follow-up.

cheers,
(Mr)Wibble