Roasting, especially when it involves children, should be done with care and sensitivity. It's important to avoid being hurtful or damaging to a child's self-esteem. Instead of a "horrific roast," consider playful humor that encourages laughter without crossing the line. Here’s a light-hearted example:
“Hey there, buddy! If you were any more adorable, I’d start charging for tickets to see you!”
Remember, the goal is to keep it fun and friendly!