Of course it’s dumb! But my 9 and 11 year olds got a lot of giggles so it was a success. I used to love the Three Stooges.
Funny note: at the end of the film the Farrelly brothers who made the movie did a short piece telling kids how the hammers and such were just toys made of rubber, so don’t go bonking people with real tools or poking their eyes.