My daughter is signed up for the diaper dash, but this is our first time participating in any kids race, so I don’t have any firsthand experience.
We did go over to the track during the races for W&D so we could get an idea of what to expect. It’s set up very well but definitely make sure you check the times of the specific race for your child. They give a very broad time range on the event page, but I think it goes 100m, 200m, diaper dash, then 1 mile. They had balls, hula hops, etc. for the kids to play with in the infield, but you don’t want to be waiting around for an hour if you don’t need to be, especially if you’re already crushed for time with the 10K.