Kids are not the same in any ways. Some kids learn quick or advance to what they should be. Some kids have developmental delay or have special needs. Playing is one way for them to learn that they will enjoy or challenge them without being discourage. It's important to find toys that will help them to learn. There is a 2008 Toy Guide for Differently-Abled Kids. Check out the list below.
Gross Motor Skills
The Inchworm by Radio Flyer (2 to 5 years)
The worm moves forward when your child bounces up and down, which encourages him to use his legs and trunk muscles for balance.
Little Mommy Doctor Set by Mattel (2 years and up)
Taking care of a "sick" friend can help your child learn empathy, social interaction, and expressive language.
Fine Motor Skills
TaDoodles All-In-One Paint by Crayola
Beginnings (2 to 5 years)
Scribbling helps develop hand-eye coordination, and these ball-shaped paint markers are perfect for children who can't yet master the pencil grip.
Deluxe Nesting and Stacking Blocks by Melissa and Doug (2 years and up)
Stacking these colorful blocks, each marked with two or three letters, can help your child learn size discrimination, sequencing skills, and the alphabet.
Learn and Groove Alphabet Drum by LeapFrog (6months to 3 years)
Every time your child tap the drum he'll see a letter displayed in lights and hear it spoken aloud, which will help his early language development.