Campbell KJ, Hesketh KD. Strategies which aim to positively impact on weight, physical activity, diet, and sedentary behaviours in children from 0 to 5 years: a systematic review of the literature. Obes Rev. Jul 2007;8(4):327-338.
Researchers conducted a systematic review of literature on obesity prevention and other healthy eating and physical activity interventions targeted at children ages 0 to 5 years old. While there was variety in study design, most interventions were multifaceted and showed at least some level of effectiveness for obesity prevention behavior in this population.