Kinder Eggs are slightly illegal to bring into the USA which would be OK I guess
Inside the egg is a large plastic pod that contains to airplane parts.
Inside you find the parts and you can easily assemble your own Airbus. This one is an A330 in Lufthansa livery.
As you can see you end up with a cool airplane model. The eggs are tough to find. After failing to find them at LHR in past months my wife managed to find an Airbus collection at CDG and was sweet enough to buy them for me during our layover on the way to Israel this week.