There are 1 venue for a kids' birthday party in Lasarte-Oria: 1 indoor play centre.
None publishes prices online, so you need to ask for a quote.
And within 15 km there are 1 more venue, in Donostia / San Sebastián.
Indoor play centre (1)
Other places nearby: Donostia / San Sebastián · Irun
Lasarte-Oria
Children's leisure centre or play park that, according to a directory, hosts birthdays; no verified own website.
Donostia / San Sebastián
Space-themed children's play park in Donostia; three-hour birthdays with a menu (Jupiter, Mercury, Saturn) and an exclusive-use option on Tuesdays.
None publishes prices online, so you need to ask for a quote.
Directly with each venue, on its website or by phone: every listing has the details and a link to the source page. Cumplalia is an independent directory: it takes no commission and does not handle bookings.