This is one excellent game that everyone can get involved in.
It can be as simple as hiding the eggs all around the house and garden and letting everyone loose to find them. Fill the eggs with whatever you like and share the spoils at the end so everyone gets something.
You could get more complicated and draw up plans and maps so everyone can search for treasure using the map. Children love that, though the map may need to be pretty simple if really young ones are involved.
Another thing to consider if chocolate and children are involved, it might be best to get everyone to look for fluffy chickens and then swap those chickens for the treats - Just to avoid toddlers sneaking behind a tree to eat the treats.
Here are the baskets your guest can use to collect the treats.
Just click on the picture to obtain them.
Here are some Easter eggs that can be filled with treats, toys and more. They are lovely to find.
They are about 3inches tall so enough space in them to fill them up with anything that takes your fancy.