Get all the immediate children folders and tell me their total size

GetChildFolderTotalSize.Ps1

function Get-ChildFolderTotalSize
{
	param($parentDir)
	
	$children = (Get-ChildItem $parentDir | Where-Object {$_.PSIsContainer -eq $True} | Sort-Object)
	$results = @();
	foreach ($i in $children)
    {
		$childSum = (Get-ChildItem $i.FullName -recurse | Measure-Object -property length -sum)
		$results += New-Object Object |
						Add-Member NoteProperty FullName $i.FullName -PassThru |
						Add-Member NoteProperty Name $i.Name -PassThru |
						Add-Member NoteProperty TotalSizeInMB ($childSum.sum / 1MB) -PassThru;										
    }
	
	$children = (Get-ChildItem $parentDir | Measure-Object -property length -sum)
	"$parentDir -- " + "{0:N2}" -f ($children.sum / 1MB) + " MB"
	
	$results | 
	Format-Table Name, @{ Label="Total folder Size"; Expression={"{0:N2}" -f $_.TotalSizeInMB  + " MB"}; Alignment="Right"}
}