Children can swim free in Dudley during the summer holidays  - here is the link. Registration is now open and the free swim commences from Tuesday 23 July.
Also if you want to venture further out of the Dudley Borough, Raring to Go have done a guide of a whole range of events / activities happening around the Midlands during the Summer holidays - here is the link.
 
For more information, or information for other times of year visit http://fis.dudley.gov.uk/fsd/ and click on the "Events - what's on" section.