Month 6: Sitting & Solid Foods
Month six: supported sitting, rolling both ways, the half-year meal plan, and the start of separation anxiety.
Sitting with Support and Rolling Both Ways
The Fact
By six months most babies sit with support and many sit briefly alone, leaning forward on their hands like a tripod. The AAP lists sitting without support as a six-month milestone, though the normal range runs from five to eight months. Rolling now goes both ways, front to back and back to front, and a baby may use rolling to cross the room. He also bears weight on his legs when held standing and reaches for a toy without toppling. Core strength is the base for everything next: sitting frees the hands, and free hands lead to grabbing, transferring, and self-feeding.
In Plain Words
Sit on the floor behind him, legs in a V, and let him lean back into you while he plays. Skip the walker and the seat that holds him upright in one position; the floor teaches balance. Put a toy to his left, then his right, so he turns and reaches and learns to catch himself. When he topples, and he will, do not gasp. A calm face tells him falling is ordinary. Fewer than twenty minutes a day of this builds the trunk he needs for sitting alone.
Cognitive Leap 5: The World of Relationships
The Fact
Around twenty-three to twenty-six weeks, the leap calendar tied to The Wonder Weeks marks leap five, the world of relationships. Your baby begins to understand distance and sequence between things: that you are still there when you leave the room, that a toy can be moved behind another, that events have a before and after. This is the cognitive root of separation anxiety, which starts now. The AAP notes object permanence, the knowledge that people and things exist when unseen, is forming. He also begins to test how you respond, dropping a spoon and watching your face.
In Plain Words
Play games that prove you come back. Peekaboo, hiding a rattle under a cloth, and handing a toy back and forth all teach the same lesson. When you leave the room, say goodbye every time instead of slipping out, because a clean exit teaches him that leaving is safe. Start a game of fetch with a soft ball: he throws, you return, he learns the loop closes. Keep the first goodbyes short and boring, and let his mother take the first few if it helps.
Purees and Allergen Introduction
The Fact
The AAP now recommends introducing common allergens, including peanut, egg, dairy, wheat, soy, fish, and sesame, starting when solids begin, and keeping them in the diet regularly once tolerated. Delaying them no longer lowers allergy risk, and for peanut, early introduction under pediatric guidance cuts the risk sharply in high-risk babies. Introduce one allergen at a time, in a safe amount, for example a thin smear of peanut butter thinned with water, never a whole nut or a glob of thick spread. Wait three to four days before the next new food, and keep the texture thin at first.
In Plain Words
Ask the pediatrician before the first peanut or egg, especially if eczema or allergy runs in the family. Do it at midday, in your own kitchen, with a phone charged. Give a small taste, then watch for two hours. If the skin stays clear and breathing is easy, keep offering that food two or three times a week so the tolerance holds. Never give whole nuts, hard chunks, or a straight spoon of peanut butter to a baby this age. Thin it, watch it, and write it down.
Night Waking and Growth Spurts
The Fact
Night waking at six months has several ordinary causes. A growth spurt, usually around three weeks, six weeks, three months, and six months, raises hunger for a few days and adds a feed or two. Teething disrupts sleep before a tooth appears. A new motor skill, such as sitting or rolling, gets practiced at night, and the leap-five brain change stirs him too. The AAP notes that by six months many babies can sleep six to eight hours without a feed, but waking is not failure. Hunger, teeth, and development all pull in different directions at once.
In Plain Words
Do not change the plan on the first bad night. Keep the bedtime routine the same and treat a genuine hunger wake as a feed, quickly and dimly, then back to bed. If he wakes to practice rolling, let him try for a minute before you go in; a skill learned by day often stops disrupting the night. Take the first shift yourself so his mother sleeps the deeper hours. Write down the nights for two weeks, and the pattern, not one hard night, will tell you what changed.
When Your Baby Cries: Separation Anxiety Begins
The Fact
Separation anxiety usually starts between six and eight months and peaks around fourteen to eighteen months. It is not a bad habit and not something to train away. Object permanence has arrived: your baby now knows you exist when you are gone, and he cannot yet hold the idea that you will return. So leaving is real, and the cry is real. The AAP advises a consistent goodbye, a short and calm routine, and a caregiver who can hold him through it. Sneaking out to avoid the tears teaches the opposite of what you want.
In Plain Words
Build a goodbye ritual you can repeat in ten seconds: a kiss on each cheek, one phrase, a wave at the door. Do it every single time, even for a trip to the bin. Then go, and do not come back to check. Hand him to someone he knows, and let that person start playing before you reach the door. At pickups, greet him warmly but without alarm. He is not measuring the minutes; he is learning that the door always opens again.
Signs of Illness: Teething vs Ear Infection
The Fact
Teething and ear infection get confused because both bring night waking and crying. Teething gives swollen gums, extra drool, an urge to chew, and mild fussiness; it can raise a temperature slightly but not above 38°C. A true fever is not teething. An ear infection, much more common in a baby who has had a cold, brings sharp pain when lying flat, tugging at one ear, fever, and a baby who cries harder at night than by day. Only a doctor can see the eardrum. The AAP does not recommend antibiotics for every ear infection, so an exam decides.
In Plain Words
When the crying is worse lying down and he keeps pulling one ear, book a visit; do not wait a week to see. For teething, offer a chilled, not frozen, teething ring and let him gnaw; a cold spoon works too. Wipe the drool so the chin does not chafe. Never rub alcohol or place a tablet on the gum. If there is a fever, swelling behind the ear, fluid from the ear, or a baby who will not feed, call the same day, and let the pediatrician decide what it is.
Dad's Checklist: Month 6
The Fact
Month six brings two milestones worth planning: the half-birthday well-child visit and the full shift to solids over the next months. At the visit, confirm growth, the next vaccines, and whether a fluoride supplement or a hearing check is needed. Set up a proper highchair and a mealtime seat where you can sit face to face. Clear the floor radius again, now that sitting and rolling can turn into reaching. And agree with your partner on how you will handle night waking, so you answer the same way and do not undo each other.
In Plain Words
Cook one puree for the week and freeze it in ice-cube trays, so a meal takes a minute, not an hour. Take the six-month visit off work if you can, and ask your three questions directly. Sit at his eye level for at least one meal a day and let him see you eat the same food. Tape the pediatrician's number and the after-hours line inside a kitchen cupboard door. Then, when he wakes at four, remember that you are not on call alone, and that this too has a horizon.