In the search for truth, you sometimes come across answers that seem impossible to believe.
In the search for truth, you sometimes come across answers that seem impossible to believe. Can that really be true? Infinity is one such concept. The universe may be infinite, and there is no such thing as a final number… Can you imagine what that means?
Mathematics is full of ideas like these that challenge our intuition. Come and build one yourself! A kaleidocycle is a continuously rotating mathematical shape—essentially a fascinating fidget toy. Once you start turning it, you won’t want to put it down.
Practical information
For whom: Fun for children aged 6 and up, accompanied by parents or guardians. Suitable for English-speaking visitors as well.
When: The holiday workshops take place during the summer holiday period for the Central Netherlands region (Saturday 18 July to Sunday 30 August 2026), daily from 10:30 am to 4:30 pm. The last tickets of the day are issued for the 3:30–4:30 pm time slot.
Cost: Participation is free with a valid admission ticket (a museum ticket or free admission with, for example, a Museumkaart).
Tickets: Collect a ticket at the museum reception desk. This ticket gives you one hour to take part in the holiday workshops. Tickets are only available on the day of your visit; advance reservations are not possible. One ticket is valid for up to two parents/guardians and four children. The final ticket issued each day is for the 3:30 pm time slot.
After-school care groups (BSOs): Groups are welcome to participate in the Design Your Own Sea Monster and Build a Kaleido Fidget workshops after making a reservation. Please make sure to visit with at least one supervisor for every six children.
