#2: How about we...set up our own lemonade stand?
On the hottest day of the year, head to the curb and channel your second grade selves by setting up a lemonade stand for the sweltering bystanders. Be sure to make the lemonade free, or use proceeds to raise money for a good cause. Or, if you're looking for a more adult version (and want to really impress your friends), try making Tequila Snow Cones.
Up Next: How about we...have a stargazing picnic?