Three-year-olds can pick up small objects, they have developed greater fine-motor skill and visual discrimination.
Although they have greater physical dexterity, they still require large pieces and an inset form or frame for placing them.
Simply Cardboard puzzles also can be introduced to these children because they are less likely to mouth the pieces and thus ruin the fit.
3-year-olds can work puzzles with 5 to 8 pieces.
By the age of Four, the children have sufficient fine-motor skill to work puzzles without knobs. they are beginning to work simply regular jigsaw type puzzles with large wooden or cardboard pieces.
Their increased cognitive ability allows them to do puzzles with 12 to 15 pieces.
Five-year-olds can work puzzles with 18 to 35 pieces.
At this age, children enjoy the themes puzzle of animal, farms, vehicles, oceans.
They are also interesting in puzzle with popular gentle cartoon characters.
The puzzle with bright color and easy to distinct are suitable for the children 3 through 5 years.
They are in the learning enlightenment stage，Number puzzle, letter puzzles, puzzle clocks and map puzzle can be introduced to them.
Appropriate puzzles for 3, 4, 5-years-old should be:
age 3, up to 12 pieces
age 4, 12-15 pieces
age 5, up to 35 pieces.
Four- to five-year-old children are also developing more systematic strategies for approaching puzzles, although they often still rely on trial and error.
As the number of puzzles pieces increases, it is difficult for children to complete the puzzles by visual memory.
so we should encourage the child to approach the puzzle through decomposition, comparison, sorting and matching.
At this age, Parents should guide the children from the simple puzzle develop to some more difficult puzzles.
According to the child’s experience with puzzles，they can develop from framed puzzles to frameless puzzles, the number of pieces is increasing gradually, the picture and color variation are also becoming more complex.