This technique is simple, yet soothing. Have your child get comfortable (for example, lean back in a chair). Have your child first try blowing bubbles using quick, shallow breaths. Watch how the bubbles pop immediately.
Now, have your child practice blowing the bubbles using slow, deep breaths. The slower your child breathes out, the more bubbles he or she will make. Have your child focus on watching all the bubbles fall and repeat the process.