You may check with party organisers if they provide helper to guide the children along in the birthday child party craft. This will enable you to leave this task with safe hands. However, if there isn't one, all these party crafts always come with simple instruction. Get a friend to help you to organise this on that day. Remember to read through and get it organised before hand as you should allocate most of your time during the birthday party to your child and the guests.
Do consider safety when organising child birthday party craft works, especially if you have very young children. Small items, sharp items should only be for the older children who know how to handle these items. Whoever assisting you with the children must ensure that safety precaution is taken to prevent any children from getting hurt.