Take him outside and play and tire him out. Are there any safe places other than your yard? We took our dog to a park near my home that is well maintained and up to our breeder's place just to socialize and meet other dogs.
Have toys all over the house within reach to stuff in your pup's mouth. Yes your home will be messy for a while.
Section off part of the house? Can you keep him downstairs so your kids can feel safe upstairs?
Toys for teething pups, like Kongs?