Whenever babies or little children die and IF they go to Heaven they are as they were.  Although, their bodies at the first resurrection will be what God determines them to be.  The Bible teaches us, "But some man will say, How are the dead raised up?  and with what body do they come?  Thou fool, that which thou sowest is not quickened, except it die: And that which thou sowest, thou sowest not that body that shall be, but bare grain, it may chance of wheat, or of some other grain: But God giveth it a body as it hath pleased him, and to every seed his own body" (I Corinthians 15:35-38).  

Apostle Paul wrote, "For now we see through a glass, darkly; but then face to face; now I know in part; but then shall I know even as also I am known" (I Corinthians 13:12).  This describes the age of perfect knowledge when born again believers will receive from God super intelligence and, even though the grain differs from the seed sown we will recognize them.  Paul reveals his understanding of the first resurrection and the nature of  resurrected bodies in: (I Corinthians 5:35-58).  

Therefore, we as humans cannot determine what grain a particular body may produce but, we can rest assured that with God both the resurrected individual and the observer will be eternally pleased with whatever the outcome.