2. Laugh with the baby.
3. Sing along with the hippo.
4. Pop some virtual bubble wrap.
Scroll down the page to "pop some virtual bubblewrap now" in green letters, and click on it, not the "insane version of virtual bubblewrap" that is even further down the page, which has rude sound effects.
5. Create fireworks.
Always aiming to provide more than is expected, here's a bonus:
Make George Bush dance.
For more Top 5 lists visit Darren Rowse's probloggers writing project.