Birthday parties

For a truly special experience, celebrate your child's next birthday at Winchester Science Centre and Planetarium.

Have fun and be inspired in this unique party setting! All parties include unlimited play on the Science Centre’s 100 hands-on exhibits plus a party food. Optional extras include unforgettable shows in the planetarium and party bags.

For enquiries: email

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Weekend birthday parties

For £11.20 per child, enjoy unlimited play on the Science Centre's 100 hands-on exhibits, and party food. One adult free for every six children.
The party food is presented in a private party room (yours for 45 minutes) and includes finger-buffet sandwiches with a choice of fillings, served with cocktail sausages, crisps, fairy cakes, ice lollies and squash.

Party extras:

Planetarium: £2.52 (standard) or £3.42 (premium) per person. See the What's On guide for the schedule or enquire for dates further in advance.

Party bags: From £3.50 per child.


Find out more about weekend parties

  • Choose from four available sittings for the party food (each lasting 45 minutes): 11.30am, 12.30pm, 1.30pm or 2.30pm. 
  • The party package includes a white table cloth and clear cups. If you would like to bring a cake or anything extra to make a party special for you, do let the staff know in advance and the Science Centre would be happy for you to bring most items. 
  • Please specify any dietary requirements when booking.
  • Minimum of 6 children per weekend birthday party.
  • Pre-booking is essential. Non-refundable deposit of £20 required when making a booking. Final balance due on the Wednesday prior to the booking.
  • Weekend birthday parties are available in term time and the Hampshire summer holidays.
  • Please note, members of staff are always happy to help, however children must be supervised by accompanying adults at all times, and are the responsibility of the hosts.
  • Due to the design of the building we are unable to allow helium balloons.

Party Bags

Party Bag 1 - £2.50
WSC pencil, mini pincer, paper laser, bubble tub


Party Bag 2 - £3.50

WSC image pen, WSC bendy rubber, mini spinner, rocket balloon, bubble tub


Party Bag 3 - £4.50
WSC frosted pad, WSC atomic ball, WSC bouncing putty, punch balloon, bubble tub, ball popper


Party Bag 4 - £5.50

WSC  orbit torch, WSC atomic rubber, WSC pencil, rainbow spring, punch balloon, bubble tub, WSC bouncing putty, mini alien egg