As the days get shorter and the Brussels drizzle settles in, parents start looking for creative ways to keep their kids entertained indoors. With autumn and winter bringing cooler, rainier days, outdoor playgrounds are less tempting — but that doesn’t mean the fun has to stop! Luckily, Brussels is packed with family-friendly indoor activities that keep little ones happy, curious, and active.
Here’s a list of the best indoor things to do in Brussels with kids this season — perfect for making the most of the colder months.
1. Step Into Wonder at the Museum of Illusions Brussels
Start your next family day out with a twist — literally! The Museum of Illusions Brussels is where imagination meets reality. Kids will love exploring mind-bending rooms, optical tricks, and interactive exhibits that challenge how we see the world. And the best part? This is one family outing where parents won’t be counting down the minutes — because the illusions will keep them just as entertained and amazed as the kids!
Pose for hilarious photos, shrink or grow in size, and experience the impossible — all while learning about how perception works. It’s a guaranteed hit with curious kids and the perfect activity for a rainy Brussels afternoon.
📍 Rue du Fossé aux Loups 18, Brussels
🎟️ Tip: Book online to skip the queue and secure your time slot.
⭐ Perfect for: All ages, family fun, and photo-worthy memories.
2. Bounce, Slide, and Play at Little Gym or Hop Up Indoor Park
When the weather turns gloomy, let the kids release some energy at Hop Up Indoor Park or The Little Gym. These bright, modern play centres offer trampolines, obstacle courses, and climbing zones for every age — from toddlers to early teens.
Parents can sit back with a coffee while little adventurers jump, roll, and climb their way through the day.
📍 Multiple locations across Brussels
3. Go Bowling or Laser Tag at Crosly Bowling
If your family enjoys a bit of friendly competition, head to Crosly Bowling for a few games. With glow-in-the-dark lanes, arcade games, and nearby restaurants, it’s a great way to spend a rainy afternoon together. Some locations even offer laser tag and family-friendly billiards.
📍 Chaussée de Louvain 656, 1030 Schaerbeek, Brussels
4. Move and Play Together at Jump XL or Koezio
When it’s cold and wet outside, keep the energy high at Jump XL Brussels, a huge indoor trampoline park where kids can jump, flip, and bounce to their hearts’ content. It’s a fun and safe space for all ages to get active and burn off some energy.
For families with older kids, Koezio at Docks Bruxsel offers a completely different kind of indoor adventure — part escape game, part obstacle course, and part team mission. It’s an amazing way to work together, laugh, and stay warm while doing something totally unique.
💦 Perfect for: Active families and those who like a bit of adventure on grey days.
5. Settle In for a Family Movie Day
Sometimes the best plan is the simplest — popcorn and a good film! Brussels’ Kinepolis and UGC De Brouckèrecinemas both show plenty of family movies, often in English or dubbed in French/Dutch. Keep an eye out for weekend matinees and Family Specials with discounted tickets.
🎬 Tip: Bring cozy sweaters — it’s the perfect way to end a grey day!