2) If you just want to spend some time outside, you can simply let your child play in the backyard or you can go to a park.

3) Playgrounds

4) Recreational Centers.

5) There are a couple on-line resources where you can try to find a friend or a playgroup in your area:
www.playgroupusa.com
So far there are no playgroups in the Tucson area, but you can start one by yourself.

www.tucsonmoms.com
This one is really functioning locally.