A great place to go when the weather isn't cooperating is Mama & Me in JP. It's located a short walk from Green Street on the orange line in the Brewery Complex. From 3:30-5:00 pm during the week they have open play. It's reasonably priced ($10), especially for siblings (only $2 more), or you can buy 10 times for $80.
It has three different rooms for the kids to play in, including a small "gym". Each things are set up a little differently, and different toys are out and available. LG currently loves playing with the fake food and kitchen, but the boys I've had beforehand love running around in the gym. They also have classes available. While most are good, for the price I think only some of the classes for older kids are worth it (particularly Paint Playground and Toddler Sports).
It has three different rooms for the kids to play in, including a small "gym". Each things are set up a little differently, and different toys are out and available. LG currently loves playing with the fake food and kitchen, but the boys I've had beforehand love running around in the gym. They also have classes available. While most are good, for the price I think only some of the classes for older kids are worth it (particularly Paint Playground and Toddler Sports).