Wonderfunkey on Western bypass near Warje is a good place to spend time if you have kids. Other than that Mulshi lake is a good car drive. Also on the same road you can go to Lavasa city. It is very scenic drive. If you take right turn at Paud village, you can go to one or two resorts there.

There are some good water sports activities going on near Sinhagad fort base as well as Panshet Dam. Katraj zoo also can be a good place for kids. Off course Sinhagad fort by vehicle as well as by foot in very early morning is also a great option. You get to test local food with curd in small matkas, onion pakodas etc.

If you are interested on little longer drive, Bhimashankar is a good place to visit. Not just for the temple but also for the forest around.

There are many more places. Pune is a great place to have weekend fun. :)

How would you like to go horse riding? There is a horse riding training centre just a few kilometres from Dehu Road...learn more about it here: http://japalouppe.net/

You could go check out the Agha Khan Palace.. I find it to be a serene place to spend a few hours.. it's a history lesson and a park in one.. so both adults and kids will like it.

It also has ample shade under trees to sit and read, while kids can play.

If adventure and trekking interests you, you might want to join in for a trek organized by Shikhar Vedh trekking group - http://shikharvedh.org/

They organize several treks around pune, karjat, satara region. Have a look at the monsoon trekking calendar too: http://shikharvedh.org/calendar.shtml

If Nature, wildlife, trekking and adventure is what you call fun weekend activity then visit: http://www.foliageoutdoors.com/home/weekend-getaways-with-foliage

Do visit Kaas plateau in the month of September if interested in flowers.

You can try minigolf at the Nagar Road, opposite Weikfield IT park.

you can see agakhan palace or sound and light show at shaniwar vada is also fun. if u r interested in shopping then pune central , khs mall , fc road and camp are good places.