Baby Development 3–6 Months: Montessori Activities and Milestones

Things are picking up. Your baby is waking up to the world in a very real way — noticing faces across the room, responding to your voice, and reaching out on purpose for the first time. These months are full of small but significant firsts.

What's developing

Movement. The early grasping reflex fades and is replaced by something better: intentional reaching. Your baby is now choosing to grab, not just reacting. By around six months they can pass objects between hands, turn and shake them, and even let go on purpose. Tummy time gets easier as head and torso control improve.

The senses. Your baby is in a full oral phase — everything goes in the mouth. This is completely normal and exactly how they explore texture, shape and temperature. Sight has come on considerably too: they can judge depth, track movement across a room, and pick out colours and contrasts that were invisible a few months ago. Hearing is sharpening, and they will turn towards familiar voices with real purpose.

Language. The babbling has begun — consonants, vowels, the first recognisable syllables. Your baby is experimenting with what their mouth and voice can do, and they love it when you copy the sounds back. Talk with them as much as you can; the topic does not matter at all.

Connection. Your baby now smiles spontaneously at friendly faces, not only at you, and is growing curious about the wider world.

How Montessori supports this stage

A lovely principle to lean on now: when your baby is deeply focused on something, hold back. Resist the urge to comment or redirect. Concentration at this age is precious and worth protecting. Offer one interesting thing at a time, within reach, and let your baby set the pace.

Simple things to try

• Reaching on a play arch. Hang a few rings or ribbons from a play arch, low enough to bat and grab. Your baby learns that reaching has a result — and that they can make things happen.
• Cause and effect. A bell that rings when kicked, a crinkly fabric toy, a simple homemade rattle — anything where your baby's own action produces a sound. The moment they realise they caused it is a genuine delight.
• Texture play. Offer safe, varied textures to feel: a soft cloth, a smooth wooden ring, a sealed sensory bag. Touch is a primary tool for learning right now.
• Books in a semicircle. Stand a few simple picture books open on the floor and sit your baby in the middle. It builds early visual focus and makes books a natural part of daily life.

Every baby moves at their own pace, so treat these ages loosely. When your baby is on the move, our 6–9 months guide continues the journey.