This is a test of commonsense. Complete the next sentence:

How to make popcorn snacks for kids 
Grease a bowl, spatula, and baking dish. 
Because the caramel is extremely sticky, you must prepare your tools and supplies. Use nonstick cooking spray to grease a large bowl, plastic spatula, and a 13-inch by 9-inch (33-cm by 23-cm) baking dish before mixing the popcorn.
If you prefer, you can use softened butter to grease your tools and supplies. Mix the popcorn and pretzel pieces.