Why not fill the tube attached to the vacuum cleaner with flour? Then attach to the blow side of the vacuum and switch it on. It's great!!! Then you can have loads more fun sucking it all up again.
Or you could get a hammer and test the malleability of metals by putting a coin or bit of brass on a flat hard surface and hitting it with all your might and seeing if you can turn it into foil.
You can also have great fun with an oven by carrying out various chemical changes in it. This is commonly known as 'cooking' and not only can you eat the results, they can taste good. After a few experiments you could do this before your Mum and Dad get home from work and you'd be much more popular than the vacuum cleaner experiment.
After that you could try finding out why it recommends not putting anything metal in the microwave. You could try foil, cutlery etc .. see which gives the best sparks. You may find the microwave doesn't work very well afterwards, but hey, now you know how to use the oven instead.
Finally if really bored, you could try using the kettle to make some spirit from wine. Don't do it on the gas ring or it may catch fire.
If you are still alive after trying all these, you could try making a motorised parachute out of your bed sheets and the cooling fan. It would be wise to do some research using your action man or something before jumping off the roof yourself.