How to Do the Splits for Kids. Part of the series: Gymnastics & Tumbling. When kids are trying to do the splits, they should make sure to stretch out first, and the teacher can help out by singing a song to make it fun. Make sure the back knee is turned under for kids' splits with help from a gymnastics coach in this free video on gymnastics and tumbling. Read more: http://www.ehow.com/video_4757110_do-splits-kids.html