We bought DD PlayDoh too, I love PlayDoh, we decide that she is too young and she will not be getting the PlayDoh, can you imagine the places it would end up.
Just let her play with them at the table - do you have a high chair or booster seat? That's where Russ plays with Play-Doh, crayons, markers...anything I don't want to see smushed/scribbled across the house.