Which one? This one -http://www.sewthankful.com/Tendril-quilting-pantograph-pattern-Lorien-Quilting.html - I'd say go for it. But if it's one of the leafy ones (there are a lot of "tendril" patterns when you google it) I'm with those who wonder if your Grandson will like that.
I made a similar quilt recently, and quilted each box with a sunburst design. I wanted something that would emphasize the stair-step pattern of the blocks. Here's my quilt, and a closeup of my quilting design.
[ATTACH=CONFIG]378623[/ATTACH]
[ATTACH=CONFIG]378624[/ATTACH]