Here are a few ideas for surprise gifts for your husband's birthday:
Plan a surprise party. Invite his friends and family and decorate the house with balloons and streamers.
Set up a treasure hunt. Write clues and hide them around the house or neighborhood, leading to a special gift or activity.
Plan a surprise outing. Take him to a place he has always wanted to visit, like a theme park or a sporting event.
Arrange for a special delivery. Have a bouquet of flowers, a gift basket, or a special treat delivered to him at work or at home.
Plan a surprise weekend getaway. Book a night or two at a nearby bed and breakfast or a cozy cabin and surprise him with the plans.
Set up a special birthday breakfast in bed. Prepare his favorite breakfast foods and serve them to him in bed with a bouquet of flowers.
Plan a surprise date night. Make reservations at a fancy restaurant or tickets to a show and surprise him with the plans.
Give him a personalized gift. Create a custom piece of art or have a special item monogrammed with his initials.
Plan a surprise outing with friends. Invite a group of his friends to do an activity he enjoys, like golfing or hiking.
Give him a gift certificate for a special experience. Consider tickets to a concert or a day at the spa.