There are people who collect Happy Meal toys, and have rooms full of them. You could find someone like that, and sell them/give them to them.
Maybe you could construct some sort of desk/table with them. Like getting a table with a large hole inthe middle that you can put them in, and them placing some plexiglass over it, to protect them and create a flat surface.
Use them as drawer pulls on cabinets and dressers.
Or put them in shadow boxes to hang on the wall.
If you make a table, you could use clear plastic tubes for the legs and fill them with toys.