Kids - Opponent in your guard. Grab the sleeve and collar. Opponent stands up. Open guard and get sleeve side foot on hip and other foot in opponents bicep.
Adults - Opponent in your guard. Grab the sleeve and collar. Opponent stands up. Open guard and get sleeve side foot on hip and other foot in opponents bicep.
As opponent brings arm back to free it, pull yourself up and go to triangle.
You can pull the trapped arm into your hip an bring your knee into your opponents elbow and finish the armbar, or shoot your foot towards your opponents head to go to omoplata.