my 4 1/2 year old is 124 cm and she is one of the tallest at kindy. The only thing i have found as she is growing is people expect to much from her sometimes as they think she is older. We have been told by the community health centre that she will be a tall adult. Her dad is tall but im average . My other 2 girls are also of average height only in 50th percentile but my 4 year old has always been over the 100th percentile. i wouldn't worry as long as she is happy and healthy.