Students (or partners) solve each word problem. When they find a solution to a problem, they search for the plastic egg with that number on it. They open the egg to check their answer. They should either mark it correct, or fix their work. They then put the answer card back in the egg and re-hide it in the same spot. Students continue this until they have either solved all of the problems, or have run out of time.
This could also be used as a math center!