SAHM 6 month old activities?

What are people doing in Denver during the week with their babies? Mine has just hit 6 months and is now showing interest in things. I’m a SAHM and I’m getting bored of the same rotating toys we have around the house. I’d love to get out and do stuff that doesn’t involve spending a bunch of money and that she would enjoy. Some days it’s too hot to be outside so a mix of outdoor/indoor activities would be lovely.