Depends on what bees they are. If they are in your wall then they could be masonry/mason/mortar bees, lots of different names but the same bee, the males don't even have a stinger and the females will only sting if they are squashed. I know you said you have kids but bees are not aggressive and should be left where they are unless really concerned about health and safety. Ive had bees and children at the same time and never had a single issue. Bees should NEVER be exterminated.