gender reveal to my bf

Andrea
My boyfriends work refuses to let him have the day off to find out the sex of our baby. he's upset he can't go  but said I don't have to do anything special for him .......
Which I don't listen to because I try to make him apart of it through whatever means I can 
So what are some ideas I.can do to surprise him on the gender. I find out tomorrow  
UPDATE.       
my boyfriend begged his boss so now he can come but thanks ladies for the great ideas 

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