Remember how in the famous cartoon the little kitten was getting to know his surroundings and hummed, "There's a lot of trouble on the left, a lot of trouble on the right..." Your little Jack could hum the same tune.
He is a curious explorer who is interested in absolutely everything around him. Everything that attracts his attention, he will try to taste. However, he can't distinguish dangerous objects from safe ones, so you will have to do it for him. To avoid unpleasantly, and sometimes stressful situations with Jack, prepare the house thoroughly for his arrival. Well, at least that part of the house, where Jack will be at first,
Remove any items from the floor that aren't toys for puppies. Remove all plants from the floor. Remove any items from the bottom shelves of cabinets and nightstands that Jack can reach, Hide all wires and extension cords from anywhere he can reach. Cover all open electrical outlets. Cover any stairs, porches, balconies, or areas where Jack might fall. Hide all your household chemicals, medicine, and food where Jack can't get it. Remove carpets from the floor. Never underestimate your Jack's ability to find or pull forbidden items literally out of nowhere. The best measure to prevent this is to simply move all temptations away.
If you live in the country, carefully check your property for broken glass, fishing hooks, and sharp objects. Walk along the fence. There should be no crevices for Jack to escape through. Dig enough netting under the fence so he can't dig under it.
Always keep the doors to the bathroom and toilet covered, since there are lots of cleaning and detergent products that not only a puppy but also an adult dog can be poisoned by.
Explain to the children the need to clean up their toys, as they are not meant for puppy play and can be dangerous for them.