Great place to hide things in your house.
Step 1: Guns
They have a lot of places to stash stuff.
Step 2: Cards
Hiding SD cards or money in plain sight.
Step 3: Toys
Some people are not looking in the right places. A box of Legos is another place to hide things.
Step 4: Tissue Boxes
Tissue boxes are great but air freshener are another thing you can use.
Step 5: Magazine and Books
That will take time to look through.
Step 6: The Wall
Power outlets and picture frames are good but use some thing that is hard to get to.
Step 7: Foods
Some times people forget to check foods.
Step 8: Fish Tank
Just get a plastic bag fill it with stuff and then put it under the gravel.