Omsi Birthday Party [best] May 2026

Note: OMSI members often receive a 10-20% discount, so if you visit frequently, membership pays for itself here. Book early. Like, really early. OMSI birthday parties are popular. Weekend slots (Saturday and Sunday mornings) often book 3 to 6 months in advance.

You are paying for your own sanity and a genuinely memorable day. When the party ends, you leave with a happy birthday kid, a few photos, and zero trash bags. That, in parenting currency, is priceless. Have you thrown an OMSI birthday party? Share your tips in the comments below! omsi birthday party

However, do the math. If you rented a community center, bought craft supplies, hired a magician, and bought pizza, you’d likely hit that number quickly. At OMSI, the entertainment is the building. Plus, you don't have to spend $50 on goodie bags—the experience is the gift. Note: OMSI members often receive a 10-20% discount,

Let’s be honest: hosting a birthday party at home can be stressful. Between the mess, the entertainment, and trying to keep a dozen sugar-fueled kids from bouncing off the walls, parents often end up more exhausted than the guests. OMSI birthday parties are popular

Whether your child is a budding paleontologist, a laser-focused engineer, or just loves watching a tornado form in a bottle, OMSI takes the pressure off the planner and puts the fun onto the floor. Here is everything you need to know about booking, budgeting, and enjoying a birthday party at one of Portland’s most beloved institutions. The single biggest selling point? You don’t clean up. After the cake is demolished and the juice boxes are drained, you walk away. OMSI handles the setup, the sweep, and the wipe-down.