I'll look up the book, thanks.
DS seems to always be seeking physical touch and movement; he loves to always be on the move, spin in circles, crashing toys, crashing himself into things, bumping things, hitting other children (he's not being aggressive, it's like he can't help it), he loves me giving him 'squeezy cuddles', tips his toy boxes upside down for no reason.
He's just turning 3 so I don't know how much of it is being a toddler and what might be something more. He does seem more 'hyper' than other children his age.
He does follow instructions (most of the time), good eye contact, speech is fine, everything else seems on track and emotionally he seems fine.
Maybe I'm worrying for nothing.