When you look at a flamingo, it seems that their knees are bending backwards. What you are actually looking at are their ankles. A flamingo's knees are higher up and hidden underneath their feathers. Their long legs bend the same way ours do, but their body parts are just in different proportions.
Flamingos walk on their toes.
Flamingos are birds. All birds lay hard-shelled eggs. Eggs come in many different sizes. Use the egg chart to create different types of eggs. After all layers are dry, take a pin and pop the balloon inside.