Tumbleweed park is always a lot of fun. It is on McQueen and Pecos. We like it because it has plenty of sidewalks to ride bikes and trikes on.
Fishing or a walk around the Riperian Preserve on Greenfield and Guadalupe.
Arcade games at Golfland/Sunsplash-while you are there maybe a quick game of miniature golf? My son still talks about his trip to Golfland with just his dad!
The movies. My kids love to go on a special movie trip with mom or dad!
The train park on Scottsdale Rd and Indian Bend in Scottsdale.
A walk to a nearby park and you can take a special bag filled with different activities like bubbles, sand toys, sidewalk chalk etc. Buy some special snacks and juice boxes and have a picnic.
Have a special art time with just him. Have your daughter go play at a friends house or take art supplies to a local park.
Our son loves science experiments and rockets. You can buy a rocket kit and shoot it off at a local park.
I hope this helps. Let me know if you need any more ideas, these are just some of the things my son and I enjoy doing. He also does them with his dad on occasion. Have fun:)