Topsy Turvy World in Barnet offers hands-on slime-making birthday parties for children aged 6 to 9, with groups of 10 to 20 welcome. Each party includes a guided slime workshop where children create and take home their own slime, two hours of play access, a private party room, party food (nuggets or veggie options), unlimited squash, aprons, plates, cups and napkins, a dedicated party helper, and full cleanup. Pricing starts from £27, £30 per child depending on peak or off-peak dates. The venue handles all organisation, leaving parents to relax while children enjoy a memorable celebration. Perfect for a stress-free birthday experience.