Hello,
You can have a self introduction of family members at first.
Next to know the count of members attending the function and accordingly arrange for food or plan for games you can arrange for some tokens with numbers. Issue the tokens and note down the number against their names for ex. Blue clour for Ladies, red colour for Kids, Yellow colour for Gents. put all the tokens in three different boxes. Have a lucky dip sort of thing. i.e., pick one token from each box and give them gift.
Secondly you can conduct Housie/Tambola, This can be 30 minutes or one hour
For Chidren, you can go for some games like tieing baloons to their one leg and they need to stamp the ballon tied on the other kids with the other leg keeping their balloon safe. the child whose balloon is intact is the winner. Give some prizes for them.
Give some complementary gifts for all the kids below 5 years like some pencil Box, tou or some balls etc.
You can even have a game for all (Pick and Act). write as many chits with something like Act as monkey, drunkard, sing asong, love making etc and ask people to pick and act what ever comes to them. it will be fun.
I think this should be enough. if you want any further help,you are welcome
Thanks & All the Best
Arasu
Better to arrange a catering service for food