have you actually gotten any decorations or habitat backgrounds? i've clicked on lots of fireflies and only gotten small numbers of stamps, potions or coins - not the same as presents where it's clearly a random number up to my level. i've gotten frogs at my level but never anything else that can be in presents.
Now that you think about it, I have not seen any give those. As a result, I will update the page accordingly until I see them appear.