Step 1: Find the materials
You'll also need scissors and a screwdriver.
Step 2: Making the "aquarium"!
First I made two holes in one bottle, to glue the two another bottles in the same body. And next I glued another small bottle to one of the large bottles.
Make you sure that the joints don't leak!
Another think to keep an eye on is to make sure that your shabby fish tank is a minium stable. You can have a flood!
Note: I only use it two hours, inside the tank, my fish was hysteric and scared. The tank I made wasn't good, because I did it very fast and grotty.
But if you do it puting in more emphasys it can be very cute, cool and a litle nerd!