Folder (with contents) copies trunk + branches - modify to copy only branches

Parent1&2 contain only child folders

Child folders contain .jpg and .xml objects

E:\Parent1 contains folders Child1.1, Child1.2

E:\Parent2 contains folders Child2.1, Child2.2, Child2.3

Desired result: E:\ with folders Child1.1, Child1.2, Child2.1, Child2.2, Child2.3

dir f:\ -recurse | where-object { $_.PSIsContainer } | ForEach-Object { $_ | Copy-Item -recurse -destination  e:\ }

Produces current result in E:\

Child1.1, Child1.2, Child2.1, Child2.2, Child2.3 ANDParent1containing folders Child1.1, Child1.2,  Parent2containing folders Child2.1, Child2.2, Child2.3

Goal: Modify script so that it does not copy parent folders