Age of Perfection

Was not quite certain where to place this question so I posted to Prophecy or End Time.

My question has to do when we are gathered together in Heaven. When we are perfected with a perfect body and Sin has been removed are we told in the Bible what are age will be. I know age will not be an issue, but say we die here on earth as an infant before this takes place will we remain and infant for eternity? Just curious if there is somewhere in the Bible where this specifies age? Thank you!