Inside the centre
Explorium opened in 2018 as Ireland’s National Sport and Science Centre, and the scale is the first surprise: more than 300 interactive exhibits over 110,000 sq ft on Blackglen Road, in the hills above Sandyford. The point is that you touch, pull, pedal and press almost everything. The Lightning Room runs a Tesla coil – billed as Ireland’s first – that cracks out visible bolts of electricity. Elsewhere there are gravity rooms that scramble your sense of level, a bed of nails you can lie on, and a maker’s lab for building and tinkering.
The floor splits into zones. The Junior Explorium is built for ages two to seven, with softer, smaller-scale play. The main Science Zone is pitched at eight and up, and holds most of the physics-and-engineering exhibits. A separate Sport Zone adds a robot goalkeeper for penalty shootouts and F1 car simulators. Younger and older children want different things here, and the layout mostly keeps them apart.
For neurodivergent families there’s a dedicated sensory space – a quieter room to step out to when the main floor gets loud.
The activities that cost extra
Some of the biggest draws are booked and paid for on top of admission: the urban climbing walls and the ‘Conquer Your Fears’ high climb, an indoor caving challenge, a VR planetarium with a Moon walk, a VR roller-coaster, and a G-Force bike that loops a full 360 degrees. Each runs to set times and has its own rules – climbers need to be at least 1m tall and 25kg, the high climb is for 10 and over, and the VR experiences start at age eight.
This is where the bill climbs. Reviews are near-unanimous that Explorium is dear: at the time of writing adult admission is around €28, children are priced by age, there’s no family ticket, and the marquee activities are charged again on top. Work out your budget before you go, or you’ll be saying no a lot at the desk.
Getting there
Explorium sits off the M50 – junction 13 southbound, 14 northbound – opposite the old Lamb Doyle’s, with free on-site parking including family and accessible bays. It’s really a drive-to attraction. On public transport the nearest Luas Green Line stop is Balally, but that leaves a 20 to 25 minute uphill walk; the 114 and 44b buses stop closer to the door.
Book online before you travel. When the centre is full it sells no walk-in tickets, and the Junior Explorium runs in timed slots that sell out on wet weekends.
Is it worth it
Explorium is best for families with children between about four and fourteen – old enough to work the exhibits, young enough to be thrilled by them. Allow at least two to three hours; committed children will fill a half-day. Being wholly indoors makes it a dependable rainy-day fallback when the nearby hills are washed out.
The honest caveat, beyond the price, is noise. At weekends and during the school holidays the main floor is packed and loud, some exhibits are inevitably out of order at any given time, and the youngest children can find it overwhelming. A weekday morning in term time is a calmer place entirely.
If you’d rather be outside, you’re in the right corner of Dublin for it. Ticknock Forest and its mountain-bike trails are minutes up the same road, Three Rock Mountain rises just behind, and Fernhill Park at Stepaside is a short drive north. Pair a morning indoors with an afternoon on the hill and you’ve a full day without moving more than a few kilometres.
A final tip
Go for the first slot of the day, especially in the school holidays. The Tesla coil and gravity rooms are far better when you’re not queuing three deep, and the Junior Explorium is at its calmest before mid-morning. Buy any climbing or caving add-ons when you book online rather than at the desk, where the popular times go first.