They can be bought at the FunPark shop.
One egg is 1,50€, so it's not too expensive, but it's not a real bargain either.
In the park, the former "Jungle/Maya" section has been converted into the "Dino Parcours" with new climbing structures (ropes + vines + wood) that take you from the lake to the castle - fit for children 5+ i'd say.
The section has the "full size" T-Rex, one triceratops adult + baby, some rangers and a hollow climbing volcanoe (about 5 feet high) that sits on giant rocking springs.
A very nice section that we explored only today.