Just wear it, with an eye towards the event. I have 11 and 13 year old girls, a 15 year old boy. I've worn the kilt to HS sporting events occasionally. I'm generally ignored by kids, positive comments from parents. My 11 year old and I go to a tartan day fest every year. She's more tolerant. The 13 year old was mortified when I picked her up from a group event wearing the kilt. I thought it was just a pickup, but the girls were still eating, so the parents invited me it and we chatted in the hall in full view of the girls in the dining room. However, no one "died" and one of the girls is on a team I coach and she never even mentioned it. Some of the other 10-13 year old players on the same team have seen me in a kilt and have asked questions, but are very satisfied with truthful answers. (Scottish heritage, I like wearing it, and it's comfortable). My 15 year old son frequently asks why I'm wearing it, and I just say the same reasons why he wears basketball shorts all the time--I like it and it's comfortable.

If you are in Murphys, that seems pretty appropriate and remind her that none of her friends will witness her father's "bizarre" clothing choices!!