Parents will receive the paper brochure (new communication support developed by Santé publique France (the French Public Health Agency)), which is the current official information on complementary feeding (CF) in France. Parents will also receive generic information contained in the health record and in connection with the general development. These 48 messages will be delivered regularly by a smartphone application from the 3rd months until the 36th months of the child.

Parent-reports at the ages of 12 and 36 months using a validated questionnaire. Parent answers to 9 items, which are then grouped to define 2 dimensions: 'Caloric compensation' and 'Eating in the absence of hunger' (EAH). Parent answers to items using a 5-category scale (never, rarely, sometimes, often, always). Higher scores mean higher behaviours.

Infant caloric compensation ability during 2 meals at the laboratory at the age of 11 months (calculation of "COMPX" scores)

Infant Eating in the Absence of Hunger (EAH) during a meal at the laboratory at the age of 30 months (assessment of quantities and choice of food consumed during 10 minutes after a meal, i.e. when the child is no longer hungry).

Parent-reports at the ages of 12, 24, 36 months using the validated French version of the Child Feeding Practices Questionnaire. Parent answers to items 1-12 using a 6-category scale (never, rarely, sometimes, often, always, not concerned). Parent answers to items 13-39 using a 5-category scale (not at all true, bit true, moderately true, rather true, very true). The 39 items are grouped to define 10 dimensions: 'Monitoring' , 'Child control' , 'Emotion Regulation' 'Positive habits', 'Restriction for weight control', 'Restriction for health reasons', 'Food as reward', 'Teaching nutrition', 'Modeling' , 'Responsibility'. Higher scores mean higher behaviors.

Filmed meal at the laboratory at the age of 36 months to observe parental strategies for coping with food refusal (parents will choose from a selection a vegetable that is not appreciated by the child. The strategies the parent will use to get the food tasted will be recorded.)

+ Filmed meal at participants' home at the age of 32 months in order to assess the quality of interactions in a more natural context.

The overall behaviors of the infant during the meal (e.g.: "turns his head", "signals with his hand that he is no longer hungry", etc.) as well as the behaviors of the parent who feeds (e.g.: "talks to encourage her infant", "takes a break from feeding", "flys the plane with the spoon", etc.) will be described on the basis of a video analysis thanks to the establishment of ethograms.

Parent-reports using a questionnaire from a previous research (RCT ECAIL). This questionnaire is composed of 93 items relating to breastfeeding (age of stopping and reasons), milks (type of milks offered to the baby), age and reasons for starting complementary feeding (CF) and items representing different drinks and complementary foods. Parent answers to each food item using a 5-category scale (not yet introduced, only once, 2 or 3 times, more often, every day or almost every day) (higher scores mean higher consumption frequency) and indicates the age of introduction as soon as the consumption frequency is higher than 'only once'.

Particular interest will be given to : 'age at the start of CF', 'reasons for starting CF', 'diversity of foods introduced between 4 and 6 months', 'diversity of major allergens introduced between 4 and 6 months', 'consumption frequency' and 'age of introduction' of various food groups.

Parent-reports using a questionnaire from a previous research (ANR OPALINE). This questionnaire is composed of 257 food items. Parent answers to each item using a 5-category scale (almost every day, 1 to 3 times a week, 1 to 3 times per month, less than once a month, never) to assess frequency (higher scores mean higher consumption frequency) and using a 4-point scale (++, +, -, --) to assess liking (higher scores mean higher liking).

Parent-reports using a summarized version of a questionnaire developed to characterize the pattern of food texture exposure in French children aged 4-36 months. This questionnaire is composed of items representing foods commonly used in France in different texture combinations (puree, pieces, raw, cooked, etc.)). Parent answers to each item using a 4-category scale (not offered, spit out, eaten with difficulty, eaten without difficulty). Higher scores mean higher behaviors.

Parents will report children general feeding skills (holding a spoon in the mouth alone, eating with fingers, self-feeding with a fork, etc.) on a 5-category scale (often, sometimes, rarely, never, I don't know). Higher scores mean higher feeding skills.

Parent-reports at the ages of 12, 24, 36 months using translated extracts from the validated Feeding Practices and Structure Questionnaire. Parent answers to 7 items using a 5-category scale (never, rarely, sometimes, often, always). Items are grouped to define 3 dimensions : 'Family meal setting', ' Structured Meal Timing', 'Structured Meal Setting '. Higher scores mean higher behaviours.

Parent-reports at the ages of 12, 24, 36 months using translated extracts from the validated Family Food Behavior Survey. Parent answers to 12 items using a 5-category scale (never true, rarely true, sometimes true, often true, always true). Items are grouped to define 2 dimensions : 'Maternal control' and 'Organization of eating environment'. Higher scores mean higher behaviours.

Parent-reports at the ages of 12, 24, 36 months using an adapted version of the Maternal Distraction Questionnaire which is a validated questionnaire. Higher scores mean higher behaviour.

Parent-reports at the ages of 12, 24, 36 months using an adapted version of the Maternal Distraction Questionnaire which is a validated questionnaire. Higher scores mean higher perception

Parent-reports using a questionnaire developped by De Rosso et al. (in press). This questionnaire is composed of 30 items representing various infant feeding recommendations. Parent first answers to each item on a dichotomous true/false scale and then indicates how sure he/she is of his/her answer on a 4-category scale (I am not at all sure, I am rather unsure, I am rather sure, I am completely sure). Two dimensions are assessed : Knowledge accuracy and Knowledge certainty.Higher scores mean higher accuracy/certainty.