+1 лучше нарукавники. Или, если ребенок боится, можно вот такой дивайс:https://www.google.com/search?q=%D0%BD%D0%B0%D1%80%D1%83%D0%BA%D0%B0%D0%B2%D0%BD%D0%B8%D0%BA%D0%B8+%D1%81+%D0%BD%D0%B0%D0%B3%D1%80%D1%83%D0%B4%D0%BD%D0%B8%D0%BA%D0%BE%D0%BC+%D0%B4%D0%BB%D1%8F+%D0%BF%D0%BB%D0%B0%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F&source=lnms&tbm=isch&sa=X&ei=rRFmVaWZIYK5ogT06YHIBg&ved=0CAcQ_AUoAQ&biw=1280&bih=613#tbm=isch&q=%D0%B4%D0%B5%D1%82%D1%81%D0%BA%D0%B8%D0%B5+%D0%B6%D0%B8%D0%BB%D0%B5%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%BF%D0%BB%D0%B0%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F&imgrc=D1LQpEB88hpskM%253A%3BxaDjkohelmo5BM%3Bhttp%253A%252F%252Fgw.alicdn.com%252Fbao%252Fuploaded%252Fi3%252FT1wcS5FANXXXXXXXXX_!!2-item_pic.png%3Bhttp%253A%252F%252Fnazya.com%252Fproduct%252Fdetskij-zhilet-dlya-plavaniya-stearns-kids_16485740967.html%3B500%3B500Это и нарукавники и под грудь поддержка.