Taking it apart requires 2 screwdrivers (the tool kind and the kind you drink!) 3 hands and nerves of steel.
The bottom of the table has 2 little boxes where you snap in the legs. Those little boxes have a slot on each side, where the tabs on the legs lock in place. One person sticks a screwdriver (or a butter knife) into each slot and gently pushes in on those tabs while the second person carefully wiggles the leg loose. Squeeze gently and work slowly, so you don't crack the plastic. Repeat on the second leg.
To reassemble the table without it locking, I stick a couple of toothpicks (a broken popsicle stick would probably work too) in those slots (in one side and out the other side). Then I can push the legs in but they won't lock in place.