The green gems matched the decor of Psalm's Hulk-themed bash.
Welcome to Psalm's 3rd birthday party!
According to a source, the party was organized by event planner Mindy Weiss. Kim also gave a shout-out to Pop Ink Design Studio and party supplies and balloon styling company Wild Child.
"Look at this mirror," Kim said. "The hands are smashed in there."
Psalm arrived to his party on a purple and green four-wheeler.
Guests could deck out their slime with tons of fun accessories.
And they could even add their own scents, like apple, strawberry, bubble gum or cotton candy.
Just look at that sign and the skyscrapers!
Oh hey there, Bruce!
Who wants a slice?
Guests could bust open the chocolate Hulk Hands to find even more sweets inside.
And if they were still hungry, they could dine on churros featuring the birthday boy.
Penelope Disick, North West, Chicago West and True Thompson all seemed to have a ball rocking out underneath the balloon archway.
Khloe Kardashian cheered on her daughter as True tried to crack open the piñata.