Digivita. She took a friend and they came back very enthusiastic. "It was fun and not difficult at all". They got to meet robot Nao, see Oculus rift and worked with Mindstorms. But the girls' favourite activity was building a piano with play dough, mandarins, a banana and the Makey makey-kit. I'll have to tell Sinterklaas that N would appreciate a kit like that.