303,545 children and parents came through their doors.
Eureka! celebrated it's busiest year in two decades in 2017.
The National Children's Museum in Halifax welcomed 303,545 people through its doors - the museum's 25th anniversary year. It was the highest number of visitors since 1998.
Eureka! Chief Executive Leigh-Anne Stradeski said: "There is no better end to the celebrations for our 25th anniversary year than knowing the last 12 months saw so many people flock to Eureka! to enjoy everything we have on offer. The huge increase in numbers was very much down to lots of new first-time visitors from across the UK coming to see digiPlaySpace, which is so pleasing as it was a very different exhibit for us.
"Many other visitors have been families coming back twice or more using our innovative ticketing system where people pay once and return as many times as they want over a year.
She added: "We are now looking to the future with our plans for a second Eureka! in the Mersey region, in partnership with Merseytravel and Wirral Council.
Holly Lynch, Labour MP for Halifax, added: "I have such fond memories of Eureka! opening when I was just 6 years old and so it has been an absolute pleasure to champion everything that it has to offer as the MP for our town, 25 years on. I am delighted last year's celebrations brought record numbers of visitors, which is great for Eureka! and great for Halifax.
"Well done to the Eureka! team for making it such a fantastic year and I will look forward to working with you towards the next 25 years."