Bar tape has 3 things going for it: It's relatively inexpensive, it's relatively easy to redo, and it can make a relatively big change in the look of your bike.

Don't over agonize. Let your daughter pick one that she likes. If and when she decides she doesn't like it for any reason, redo her bike with something else. Folks who have as many years of riding as zonatandem generally gravitate to black cork but it may take your daughter awhile to understand the wisdom in that.