Cheap/Free things to do with Young Kids

I have been looking for cheap/free things to do with my kids who are 2 and 16 months. I have a small list of things that are free or cheap to do in Utah County.

~Jump on It- Kids 3 and under jump free, parents can watch for free. Also they have Mom and Me time on Wednesdays at 10 am. 1 adult jumps free and its 3 dollars for 1st child and 2 dollars for additional children. http://www.jumponitparty.com/


~Thanksgiving Point Farm Country- Kids 2 and under are free and its only $3.50 per adult, $2.50 for kids over 2. Season Pass is only $45 for whole family.
http://www.thanksgivingpoint.com/visit/farm_country/about/location_and_hours.html

~Orem Public Library Lap time- Tuesday Wednesday and Thursdays at 10 am It last up to30 minutes and is great for the young kids. Its free! (there is also story time for older kids on the same days at 10:30 also Free!)
http://lib.orem.org/

~Hogle Zoo- Kids 2 and under are free, Kids 3-12, $6, and one adult is $8. Season pass for family is $65.
https://www.hoglezoo.org/your_zoo_visit/your_zoo_visit/hours_admissions/

Let me know if there is anything to add for Utah County for free or cheap things to do with kids!