Alex says:
The mobile phone on the opening page: <span class='standouttext'>Spoiler : </span><span class='spoiler'>Enter the phone number given for the Ministry of Magic in Order of the Phoenix. I can't remember it, and I don't have my book with me. Sorry <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /></span>
Potion Ingredients: <span class='standouttext'>Spoiler : </span><span class='spoiler'>On the 'Extras' page (the coffee cup link) use the eraser at the bottom left (clik and drag) on the blank piece of paper to reveal what you need to collect for your potion.</span>
Medals: <span class='standouttext'>Spoiler : </span><span class='spoiler'>On the 'Fan Sites' page drag the medals on either side of the large loving cup into their cases.</span>
Locked Box: <span class='standouttext'>Spoiler : </span><span class='spoiler'>On the 'Links' page, drag the book with the question mark (on the top shelf) across to the left to reveal a key. Use the key to unlock the box to the right of the screen.</span>
Locked Door: <span class='standouttext'>Spoiler : </span><span class='spoiler'>This door will open when it's good and ready. Have a look around to find out what was revealed the last time it opened. Yay for Book Six goodness!</span>