It's important to choose a toy that the child wants to play with, that is age-appropriate and safe and that the parents will like too! The easiest way to choose the right toys and games is to talk to the parents of the child in question. Children develop at different rates and the parents will be able to tell you about the child's likes and dislikes. This will also avoid duplication of gifts. The majority of toys will work on physical or education development although there is obviously some cross-over here.
Toys for babies
Babies learn though using their senses so toys that work on this level will always go down well. For example, look for toys that make noise, mirrors, play gyms, soft toys and soft books, toys that stack and toys that can be made to move by a push-pull method.
Toys for toddlers
Toddlers are obviously more active than babies and spend a lot of time working out how to use their bodies confidently. Look for toys that encourage them to be physical such as ride-ons, slides and climbing equipment. Other useful toys include musical instruments, music CDs/tapes, dough, building sets, basic puzzles, books and puzzle games such as shape sorters.
Toys for pre-school children
At this age children are more confident with the physical aspects of their bodies and turn to more socialised and imaginative play. Look for dressing up clothes and toys that they can role play with such as dolls, puppets and shopping sets that include play food and a cash register. Music is still a good option here as are books and more complicated puzzles. Construction toys and toys that start them learning such as alphabet and number games will also be useful here.
Safety issues
Toys should be safe and age-appropriate. Do make sure that any toy or game comes with an accreditation such as the British Standards Kite Mark or an EN/CE rating. Try to buy toys from established retailers and from manufacturers with a solid reputation. Be careful when buying second-hand toys as wear and tear may make them less safe.
Never ignore the age restrictions given on toys -- they are there for a reason. Many toys, for example, come with small parts that make them unsuitable for use by smaller children -- so, if a toy says that it is unsuitable for a child under 3 then be careful before you buy for that age range.
Conclusion
Even the smallest of children will learn to like certain types of toy and to dislike others. A child will benefit most from a toy that they like so do take time to talk to the child and/or the parents before making a purchase.