Specialized Self-Rescue Swimming Lessons For Children From 6 Months to 6 Years Old. As part of Infant Swimming Resource ISR Swim School is dedicated to prevent infant drowning. ISR is the safest provider of comprehensive swimming and aquatic self-rescue™ instruction. Infants 6-12 months learn survival floating. Babies first learn breath control and are then taught correct floating postures. They learn how to roll onto their back from varied positions, and the skills to remain floating for varied periods of time. Children 12 months to 6 years learn to swim- float- swim. Your child will learn breath control and how to turn around in the water to secure the edge. He will then learn to swim through the water, rollback-to-float, and how to flip over to swim again...this sequence can be repeated until safety is reached. Since most drownings occur while the child is in regular clothing, all children will also learn how to perform these skills fully clothed.