Rules on the autistic spectrum are important. Matter of fact - break a rule an aspie set in their life and meltdown is likely to happen. But that said - if you have made a rule, it has to be a rule that makes sense to the child. If your grand daughter doesn't see the logic or point of a rule - I bet she will continually break that rule. Especially if she is the logical type. Explain the rule in a way she can relate to.

Just make sure these rules can not morph into something harmful in the long run. See a good example here... http://life-with-aspergers.blogspot.com/...rules.html

Having SPD is one thing - being an aspie or autie adds a whole new ballgame. Try searching wrongplanet.net when it comes to autism issues. The biggest gift you can give your grandchild is learning to understand her on a deep intuitive level. Which you probably already know

But being majorly misunderstood my entire life compels me to add that last bit onto my post. I hope all works out for you and yours.