I have used a super yard gate ( I think they are called this )!to section off my entry . It is 7 ft wide by about 10 ft long so I regularly let the older dck and my own play !!!! It works great !! I still have constant supervision and projects or puzzles do not get destroyed !! Sometimes the little dck stand watching at the gate and clapping for the tall towers and such being built !!!
My older dck do not get so frustrated at the little ones and the little ones have room to use the ride on toys !!!!
I think it will make your life a little easier !!!