Here's all the superheroes:
Grant dressed up as Slade (from the Teen Titans show) and dropped "bombs" (i.e. black balloons) that all the kids had to stop from exploding (i.e. pop).
Then he dropped "cryptonite" around the yard that the kids had to pick up and put in the neutralizer (i.e. cooler).
To stop Slade for good, the kids blew poisonous bubbles at him.
Then he was put in jail for good.
There was cake to celebrate the successful capture of Slade.
This was Ava's decoration for the party. :)
Grandma and Grandpa's present arrived later that day and trumped any presents that Mom and Dad got.
Wait, I thought these presents were for Ava???