I live near Winterset, Iowa. It is just far enough away from Des Moines that traveling here feels like a fun little daycation or field trip. Iowa has lots of fun little places like this. Another nearby place is Brenton Arboretum, near Dallas Center. They offer field trip days for groups of kids where you learn about trees, insect, and other topics in nature. The hashtags below will show you some of these areas with things to do at a stone's throw away.