Sì! Si legano alcune “pignatte”, vasi, ad una fune e si lasciano sospesi ad altezza di qualche metro. Ad ogni giocatore bendato si dà un bastone. Why do you use the third person plural in the 1st 2 examples of si and then the 3rd person singular in the last (si da)?

Ciao Maycha, in the first and second example of the sentence, after the "si" we use the verb in the 3rd plural form because it refers to the nouns "pignatte" and "vasi", which are plural. In the third example instead the verb is in the 3rd singular form because it refers to "bastone" which is a singular noun. I hope this helps :)