Babies grow so fast in the first two years that most products are used for a few months and then put aside. This guide splits baby development into stages, explains what is actually needed in each, and shows where buying second-hand protects your budget.
1. 0–3 months: the newborn stage
In the first three months a baby spends most of the day asleep. The list is short, but the items get heavy use: a crib or bedside cot, size 50–56 sleepsuits and bodysuits, a bouncer and a group 0+ car seat.
These are the shortest-lived products of all. A size 50 bodysuit is worn for less than four weeks by most babies, which is why the second-hand market is fullest and cleanest in these sizes.
- Crib or bedside cot (second-hand: fine, mattress new)
- Size 50–56 sleepsuits and bodysuits (second-hand: ideal)
- Group 0+ car seat (second-hand: only with a no-accident declaration)
- Bouncer (second-hand: fine)
2. 3–6 months: head control and rolling
The baby starts holding their head up, rolling over and reaching for objects. A play mat and the first rattles come into play. Clothing moves up to size 62–68.
In the stroller, these months mark the move from fully reclined to half-sitting. When buying, make sure the backrest has several positions so the same stroller lasts two years.
- Play mat and rattles (second-hand: washable ones)
- Size 62–68 clothing
- Stroller with a multi-position backrest
3. 6–12 months: solids and sitting
Solid food starts around month six, so a high chair, bibs and a spoon set join the list. Once the baby sits unaided and starts crawling, home safety items (socket covers, cupboard locks) are needed.
The high chair is one of the longest-used products; adjustable models grow with the child up to age three. When buying second-hand, check that the harness is complete and the seat is easy to clean.
- High chair (second-hand: ideal)
- Bibs, spoon and plate set
- Size 74–80 clothing
- Home safety products
4. 12–24 months: walking and exploring
With the first steps come the first shoes, push-along toys instead of walkers, and a group 1 car seat. Clothing moves to size 86–92 and is now worn for much longer.
A lightweight umbrella stroller replaces the full-size one at this stage; a walking toddler spends less time riding. Umbrella strollers are among the most traded items on the second-hand market.
- First-step shoes (new recommended)
- Push-along and building toys
- Group 1 car seat
- Umbrella stroller
5. The rule for every stage: leave room to grow
One size up in clothing, one group up in car seats and an adjustable stroller all mean using the same product longer. Add your baby’s birth date to your Büyüdü profile and search results are sorted by that month’s size.