Children’s dancing on a wooden floor can be fun to watch and fun and exercise for them. Recently I was instructed on how old wooden dance floors are prepped to good dance surfaces and safe. This info pertains to real wood floors not laminate. ( other than last step)

Most newish and old floors have snag problems from nails working them up to the surface from their clinch point. To wood grain shearing producing sharp uplifted shards of wood.
With a few layers of slightly damp  paper towel very lightly rub the wood floor. Using this technique you can find the nails and uplifted wood shards – look carefully at knots and dark grain areas.

AS you find a area of issue work the problem – pull nails which are very loose, and replace with a slightly larger finish nail. Counter sink the nail.