I love this one because it does not seem like it would be so hard. Get a small bowl of white rice and mix it with small safety pins. The host holds the bowl over the guest head or somewhere that the guest cannot see the bowl. They have to pick out as many safety pins in whatever amount of time you give them.
Also you can get newborn baby socks in assorted colors and patterns and take them apart and put them in a big bowl. Each guest has 30 seconds to match each pair up whoever gets the most pairs wins.
Another funny but kinda gross and fun. Get some baby diapers and make a small "mess" in the diaper with either baby food or a chocolate type candy bar and each guest has to guess what food or candy is in the diaper. For example: a hershey kiss, butterfinger,snickers, or baby ruth. For the baby food squash,carrots, sweet potatoes, green beans etc etc.
Hope this helps!