These are the ones I can think of:

• Green Park, Baner Road. Trampoline, slides, a jungle-gym, tattoo artist make it a hit with kids
• Rajwada, Baner Road.
• Wunderfunkey, on Dehu-Katraj Bypass (i.e. Bangalore Bypass), between Chandani Chowk and Warje. It has a games arcade and a bunch of other things. Has a restaurant at the top.
• 3D destination fun, Mukund Nagar (beyond Swar Gate). Has bowling, other games including video games, and a restaurant.
• ABC Farms. There's a very nice mini-golf course that kids would love. Follow it up with dinner in one of the many restaurants in the same campus.
• Sanskriti, on Solapur Road. Lots of activities - playground, magician, puppets show, singing, dancing, other shows; All-you-can-eat snacks followed by dinner.
• Lekha Farms, near Dehu, on Dehu-Katraj Road, just past the beginning of the express highway. Similar to Sanskriti; a little less elaborate. But has a swimming pool too. Camel & horse rides.
• Chokhi Dhani, on Nagar Road, near Wagholi. Similar to Sanskriti - a little more of a Rajasthani village atmosphere.