FJ wow that would be hard.... maybe get some social stories about newborns in the house? Try googling newborn ASD social stories. It may give another way of explanation for them which they would understand?

Laura - maybe a PDD-NOS diagnosis? I dunno.... but if you can get access to early intervention, take it. Seriously.... even if in the end its Sensory Integretion (and there are major changes in the cogs for SI and getting early intervention) than you need help no matter what... early intervention can help so much.