Apply glue to the backside of a second plate, then place that piece on top of the other one. This should create a Lego sandwich with two eye pins in between. Make sure you glue the back sides of the pieces together. That way the studs are exposed for decorating. Go ahead and let the glue dry for a few hours before doing anything else. Use this time to make a few more Lego sandwiches for the other earring or any other jewelry items.