The purpose of this study is to test the impact on child growth of three specially formulated complementary food supplements vs. Plumpy'Doz, a previously tested, commercially available complementary food, and vs. a control group that receives no food. All groups will receive nutrition education related to infant and young child feeding. This will be a cluster-randomised trial in children 6-18 months old in rural Rangpur and Gaibandha in Bangladesh.