Hey Matteo! Aurora from Milwaukee here. Teacher for second graders, so I've seen a LOT of themed parties. And yeah, I've done a space party! My Emma just turned 9 too, and her younger sister Isla is 5. We actually tried a joint space thing last year. Big mistake. Trying to figure out what age is appropriate for a space party for a 5-year-old and a 9-year-old at the same time? It’s a recipe for disaster. The little ones wanted to just run around and touch everything. The older kids wanted to do stuff. Ended up with a lot of tears, mostly mine. Honestly, if it's just for Sofia and her crew, 9 is a perfect age! They're old enough to appreciate the cool science stuff but still young enough to think it's fun to pretend. I learned my lesson. Separate parties from now on. So yeah, for Emma's party this year, we just did a simple art party. Much easier. But back to space for 9-year-olds: my biggest fail was trying to make space food. I saw this recipe for "moon rock" cookies. Sounded cool. Looked like burnt lumps of coal. The kids just looked at them. Ended up ordering pizza and everyone was happy. Backup plan saves the day again. Seriously, don't overthink the food. For activities, we did a "constellation quest" where I hid glow-in-the-dark stars with numbers on them around the yard, and they had to connect the dots on a printout to reveal constellations. That was a hit for the 9-year-olds. Also, a quick tip: you know how important treat bag planning is, especially for this age. They still expect a little something! I usually budget about $5 per kid for those, fill them with things like galactic slime, mini glow sticks, and space-themed stickers. Nothing too fancy, but they love it.

Hi Matteo! Josephine from right here in Philly! Auntie to Maya (1), Miles (4), and Zoe (8), so I’m always knee-deep in party planning. My niece Zoe just had her 8th birthday, and we did a space-adjacent "Galaxy Glow" party. I agree, 9 is a fantastic age for a space theme because they can really get into the activities. My thought on what age is appropriate for a space party really comes down to the activities you plan. For older kids, you want more engagement, less just looking at stuff. My quirk is I always over-buy supplies, so I usually have tons of craft stuff left over. For Zoe's party, we bought a giant roll of black paper from a craft store for like $12. We covered one wall with it and had a "planet building station" with tempera paints, sponges, and glitter (don't tell Amelia!). The kids went wild creating their own planets. Another idea was making "alien masks" with paper plates, pipe cleaners, and googly eyes. Very crafty, very step-by-step, and they loved customizing them. We even set up a little "photo booth" area with a silver tablecloth backdrop and some fun props. Since you photograph everything, that would be perfect for Sofia! And honestly, the best part was when they got to launch "rockets" (decorated paper towel rolls) using those little stomp rocket launchers. We bought a pack of two for $25. They were outside for an hour doing that. For budget, I totally get it. My nephew Miles’s 4th birthday construction party came in under $75 because I DIY’d almost everything. You can check out some of those construction party ideas for inspiration on saving money on decorations. For space, think balloons in dark blues, purples, and silver, maybe some string lights to look like stars. You can get those colors pretty cheap at Party City.

Hey Matteo! Amelia here, from Boston. Nanny to Ethan, who's 8, and let me tell you, I'm all about minimal effort, maximum impact. Glitter is my sworn enemy, so your unicorn party sounds like my personal nightmare, haha! When you're trying to figure out what age is appropriate for a space party, I think 8-10 is prime time. They're still imaginative but can follow directions for cool activities. Ethan and his buddies would totally be into a space theme. What I usually do is hit up the Dollar Tree. Seriously, it's a goldmine. For a space party, I'd grab some black plastic tablecloths for backdrops, silver and blue balloons, and maybe some glow sticks. They always have those little plastic alien figures or astronaut toys. We did a "Mars Rover obstacle course" in the living room once, just using couch cushions and laundry baskets. The kids had to navigate their "rovers" (themselves, crawling with a toy alien) through the course to "collect samples." Super easy, cost nothing but a little setup time, and they thought it was hilarious. Another thing for that age is a "UFO toss." Grab a cheap hula hoop (or even just draw a circle on a sheet) and have them toss frisbees or beanbags through it. I saw some cool Bluey party ideas online recently, and while that's younger, a lot of the simple game concepts translate. Like "pass the parcel" but with a space-themed prize in each layer. And don't forget the party hats! A pack of Kids Birthday Party Hats in silver or blue would look awesome with a space theme. You can even stick little star stickers on them. Ethan loves anything where he gets to wear a hat or a prop. Keeps them engaged and makes for great photos without a ton of work. Good luck with Sofia's party, sounds like it's going to be out of this world!