Alright! I can help!
I've had this problem before myself.
To pick up an item, you need to either click and hold or double click I think, but don't quote me on it.
If you are having troubles getting the item, you can go into F3 camera mode by holding in fn and pressing F3 (On laptops I believe)
Then, just zoom in on the egg and you'll be able to pick it up.