Chemical reactions and catalysts. A chemical reaction involves a chemical change, which happens when two or more particles (which can be molecules, atoms or ions) interact. For example, when iron and oxygen react, they change to a new substance, iron oxide (rust).
It's important for parents to start weaning babies from bottles around the end of the first year and start getting them comfortable drinking from cups. The longer parents wait to start the transition, the more attached kids become to their bottles and the more difficult it can be to break the bottle habit.
You should start giving your baby solid foods, often called weaning, when they are around six months old.Health experts agree that this is the best age. Before this, your baby's digestive system is not developed enough to cope with solid foods.If you're breastfeeding, feeding only breast milk up to around six months will give your baby extra protection against infection.ou should start giving your baby solid foods, often called weaning, when they are around six months old.