i came up with 2 for my own gate crash...
1) buy those alphabet macaroni... & make them find the alphabets (with or without hands.. up to u to decide) to make up the words or sentence u want...
2) 1 pokercard to be pass down frm 1 guy to another in a line with their lips sucking it until it reaches the groom.. if card fall halfway thru... redo all over again!