Play & Stay - Sutton Coldfield/Birmingham

[2008twin]

I'm not sure if I am posting in the right area so apologies if I'm not. I am looking for a play and stay group in the Sutton Coldfield/Birmingham area for the afternoons. I am the mother of 17-month old twins who unfortunately have their nap in the morning therefore missing all the sessions that run in the area. I really don't want to mess around with their sleeping routine as it really suits them but on the other hand don't want them missing out. Would be grateful for any suggestions of where I can take them.
Thanks a lot.