In the tourney, the kids had to sign up for events or things that they could do.
Forms (they learn a form in the style they are studing (Kenpo, Kung Fu or Tai Chi)
Weapons Form (same as above but just with a weapon in the style they are studying
San Shou (adults and this is full contact fighting)
Push Hands (Tai Chi sparring)
So Alida and Nate are in Kenpo so they showed their form, Alida was Hung Wan (not sure on spelling) and Nate's was Short Tiger, the weapons form was Twin Daggers (which they learned in a seminar)
If you want to know more about this you can visit the website of their school at www.risingdragonsmartialarts.com